The good thing about the 4.007 DM thread being shut down was that everybody got the chance to let the discussion breathe and get a little more in-game context. Personally, I think the following:
1) In the "weak" planes, you absolutely can keep your wings on, even after being seriously damaged - but, if you have someone engaging you then you essentially have to choose between tame manoeuvres and getting shot in the back, or proper evasive manoeuvres that pull your wings off.
2) Control surface damage still seems to be, just, far, far too frequent. During one training night I was doing a bit of sparring with one of the 103rd guys. We must have had about 20 duels - about 18 of which resulted in me shooting out one or more of his controls, or vice versa, with the first burst that landed.
It might not have been clear from my comments regarding the DM in previous discussions, but I actually like the direction the Devs are taking - introducing more complexity and different outcomes to battle damage - I think it's great, and can create a more interesting experience! However, the current implementation of the new features does feel exaggerated to me. At the moment I think the Pfalz and D7 are exhibiting pretty good DM characteristics in the wing-shedding department - they are tough, and can certainly take a few bursts and continue to manoeuvre pretty hard - but doing anything extreme will take your wings off. I'd want to see the other planes come closer to those characteristics.
Talbot & I are just about done collecting data from USAS combat reports and other period sources, with illuminating results. We're just working on formatting what we've collected into something presentable!