Exactly this...I don't care how FvS do in high level raids, I don't play those...but I do use wings for everything else because they're fun.
Make those raids debuff the FvS so that they have limited or no use of wings, but don't destroy an entire class because you didn't think before you gave them certain abilities.
Changing the way FvS wings work = FAIL!
and yes, I will definitely quit playing.