Stukas being vulnerable at last? Gotta check this out. I haven't done any missions against these for a loooong time, because few patches ago they could absorb ridiculous amounts of bullets (especially .30 caliber), which made emulating early BoB scenarios quite a bit difficult. If they're less "panzer" now, I'm all for it!
Re: La-5/7 and Fw-190 - they are amongst the oldest models, dating back to the very first version of the game and their simplified DMs were never really completely upgraded, hence the engines and fuselages made of reinforced concrete
. We just have to live with it and hope that TD will consider putting these on "to do" list (including aforementioned R-2800).