Storch..et.al... I've been a LW fan/pilot in Aces High for over four years. The 109 and 190 haven't really changed a whole lot in thier flight model.
From my persepctive, there are a couple of factors that can greatly impact gameplay that you often balance out in a sim. For example, if you take a great game we all love, called Wings Over Vietnam, aircraft pretty much fly on rails, but bleed speed like a stuck pig. The gameplay however is simple because the aircraft are easy to fly and the cockpits easy to use.
Take something like Lo-MAC - geez, you need a frackin degree in avionics to use the F-15. The A-10 is simple, but she's a simple bird to begin with.
In Aces High - the aircraft are simple. Flaps, gear, trim, auto climb/level/speed, dive brakes(if you got them), and then flight model.
For the flight model - couple of factors impact playability - stall characteristics, energy retention, acceleration, roll rate, turn rate, and top speed.
I really think HTC has balanced these flight model items to make the game playable. It's not going to be perfect, and I'm glad they haven't mucked to much with the 109/190. Sure, flap use at higher speeds would be nice (and historic), but you know what, it always comes down to the man, not the machine. I can up in a Spitfire XIV or Tempest, blazing in at 400mph, do a stupid manouver and still get popped by a 190A5 or 109F-4, if the pilot is smart.
I wish the 190's accelerated faster than they do, but they're not too far off. My acceleration tests have proven that fact - most 109 and 190's are in the top 20. Most American birds are slooooow to accelerate, but have high top speed.
We're not after a high-fidelity flight model in AH. Frack, that would be crazy trying to fly in an environment so uncompromising it'll kill you just trying to learn the game. Doesn't make $$$ sense either.
The LW aircraft may be off, but so are a lot of other birds. Bottom line is, how much time and effort makes monetary sense to investigate these items that would actually result in better profits and gameplay?
Make a case to HTC on how fixing X problem makes $$$ sense and a better product, then I'm sure you'll have their attention.