I just thought I'd post my thoughts on Parkers past and present and what I'd fancy in the future, foibles I have and would fix if I ran the company and money was no object, and what makes Parker special in my eyes. Kinda what I'd get if I had loads of spare money and could get a custom shop with no price limits. Obviously this is personal taste but it's my 5c on it...
The newer looking headstock
I love the way my 2004 Mojo looks, and my old MIDIFly (let's call it Nitefly for the purposes of this as that's it's style, it just has a shed-load of extra circuit in), but sometimes the simplicity of having a guitar you can just hang on a wall hanger is nice for a start. The old headstock looks kinda cool, but the new one with the two-tone look on the DF and some of the Mojos on the website wins in my opinion. Has all the futuristic look of the old, but I think the extra curve in a different colour adds to it's overall visual appeal. Still "interesting", but less insect-y (an ironic comment for a fly I know). It could even have less flare right at the end so it looks less square. Anyway, new headstock is nice, any more than that is picky. Can't adjust the truss rod so easily so a functional step slightly backwards, but you can't do much about that.
The legendary 'pointy' upper horn
It looks cool. I don't find it that uncomfortable very often, but sometimes it's a little pokey. IMHO I'd like it rounded out just a little bit whilst retaining enough thickness for strength, but not as much as the Maxxfly though. That has gone a little normal for my tastes. Somewhere between the two, but erring definitely towards the original. My Nitefly doesn't seem as pokey as it's a lot thicker, but it should be eay to retain more of the original look without so much poke.
Reinforced neck, the fingerboard/stainless frets
The neck is why I bought my Parker. Well, the neck and the tone, which is a byproduct of the thin resonant body and neck, both with reinforcement. To me if it doesn't have that, then it's not really a proper Parker in spirit. It's the magic ingredient else I may as well start looking about at other very nicely made hand-crafted custom guitars. Pure wood is good, but there's a lot of pure wood good out there to choose from. I instantly lose interest in the all wood ones. They're still cool guitars, but there's lots of cool guitars in the world. I'd quite like the option of more jumbo frets on a fly though.
The Bridge
The tension wheel and step stop issue. Why did it go! I've never owned the old one with a step/stop switch and tension wheel but I still get annoyed I don't have one when I have to adjust mine. This guitar has an amazing trem. You can lock it fixed/bend down only, or have it floating. You can also lock it while retuning (especially helpful going standard to drop D say), then unlock and adjust tension for same balance and flat trem, far superior for intonation. But why do I need this silly metal stick? Why can I not slide a thing with my finger and use a big thumb screw? I can actually lock, tune, and unlock the old style on stage. I'm not gonna take a pointy stick with me. I often play bend down only on stage as if I go to drop D it's a PITA to retune on any floating trem. If I break a string I'm stuffed for the rest of the song if floating. I see so many reasons to have it but it's gone. It almost makes me want to buy an old 2nd hand one just for the step-stop. Many refinements have been made to the fly. Taking away the tension wheel and a finger-accessible step-stop switch definitely weren't one of them.
The only limitation I saw to the previous version still remains, you can over-tightn the spring if you can't see what you're doing. But this still remains. A little slot so I can make sure I haven't exceeded those 15 max recommended turns would be handy.
Obviously this doesn't apply to the Nitefly, but the Nitefly trem isn't as flexible. I just accept that. Therefore it's not nearly as frustrating as having all the possibilities of the Deluxe/Mojo Fly, but half-spoiled cuz you need a little metal stick to get to that great functionality hidden by a bit of plastic.
I also have to be careful what strings I put on as some brands back-winding (if that's what it's called?), is longer than others. This means some brands don't sit properly on the low E (and occasionally A). If the bridge was fractionally longer on the bass side by a couple of mm it'd be nice. Especially with heavier gauge strings.
Pickups
The pickup cavity in the true fly limits the options. Since loads of my friends swear by and all have great experiences with Bareknuckle Pickups it'd be grand if you could have a BKP option or 2. Or they want something harder than the Dimarzios, but don't like the tone of the JB.
Editions/special features/Fantasy
Bypass switch/passive mixing
Sure the mixed Mag/Piezo sound is cool. Lots of people use it. Personally I never do. My problem is I have little use for it, and so if I use a mono guitar lead into my amp the mag pickups are active. This means any of the vintage style fuzzes from classic Hendrix-style fuzz faces to modern Muse-sounding ZVex Fuzz Factories won't fuzz properly. Being the weaselly chap I am and having RTFM, I use a special mono lead I made up with a stereo end so my smart-switch thinks it's a stereo lead so sends out the mags un-buffered, and the piezo goes no-where. Hurrah! Proper fuzz! Apart from my piezo is useless (not much of a problem), but I have to always have a battery in, even though I'm just using the mag pickups mono. Is there not a more sensible method where I can have an active bypass for mag pickups? Maybe this is just me being odd again. I guess I could always hard-wire.
General Versions
Niteflies and pick guards: Make another Southern Nitefly! My mojo is the heavy thing proper rock thing. The Nitefly is the bolt-on, alder-body, strat version. I like my pick guard. It makes it have more of the vintage appeal of a strat with that 5-way, sparkly pick guard, and the HSS pickup config. Also, what I really wan a get next when I have some cash is a Southern Nitefly. I want a tele, but with that added Parker vibe, stainless frets and carbon fibre/epoxy neck/fingerboard. 2nd hand they seem pretty rare, and I reckon if there was another version of that but with the "slightly less freaky" headstock it would sell, and I'd instantly be saving for a butterscotch one.
Self tuning.
I don't want that fake wizardry of modelling the guitar output like Peavey do in that £400 model of theirs. This is a Parker: It sounds amazing and true to itself and shouldn't be tainted by modelling nonsense. Although it's short there's still a slight latency ruining that immediate feel, and I don't want the soul removed. Why isn't there a model more like Gibson's robot-tuning one? I looked at getting a Tronical system to fit to mine. I think they do the right spacing, but might look slightly odd as it wouldn't hide behind the old style headstock as well as the new. TBH it wouldn't work for all the instant alternative tuning nearly so well if you had the trem in floating mode. Maybe a hard-tail then? This doesn't matter nearly so much if you brought back the step/stop and tension wheel from the original. You could lock it, run the robot tuner within seconds, then drop off the the step/stop and just re-adjust tension so the whole thing goes back into tune. Maybe I'm just heading off into the real groundbreaking stuff though if I start dreaming of a robot tuner from Tronical/Parker that tightens, drops back to the step stop, tunes the guitar, unlocks the step/stop then readjusts the tension wheel so it's still in tune. Maybe a self-tuning and alternate tuning guitar with a floating trem is really something for the 22nd century...