Personally i think every aircraft should be modelled as closely to the actual flight characteristics as possible! Currently every aircraft uses the same model with very minor changes (that keep changing) to airspeed, coefficient of lift, power and drag making it a "game" to find the current advantage given plane set.
I think you're mixing up AH and IL2. IL2 has every plane with the same identical flight model but different speeds.
AH has given most of its aircraft a distinctive "feel" and handling when you fly them. Fly a 190 like a spit and you'll dip a wing and spin out. Fly a spit like a pony and all of a sudden you'll be locking your contols due to compressiong. The low speed handling of the 109s are night and day as compared to the low speed handling of the C2s.
While I agree that HTC should try as much as possible to model aircraft accurately, I had to disagree with your comment above.
That out of the way, specifically it might generate more discussion if you pointed out WHICH areas of the 109E flight model you were saying needed to be revise.
I know the flaps are too fast. I know the P-40E flaps are way too slow (in real life they pop from up to full down in 1.5 seconds). I know the F4us have way too little torque and adverse handling effects. I know the P-51s lack their unstable departures and widowmaker spins that they had in real life (and no, not talking about just with aux tank filled).
So there are a lot of areas they need to work on -- hopefully they have a "to do" list somewhere -- but just pasting a link and saying "make it like this!" isn't always the best way to bring about change.
P.S. To further discussion, I will be forced to point out that the article is about flying a restored replica. I doubt it has real guns (those are probably empty pipes for barrels) nor ammunition, thus being many hundreds of pounds lighter than a war-time 109E would be. Have to consider that SOME things won't be historically correct, but then again others will (i.e. slat popping behavior, to name one example).