As if it's not easy enough to kill tanks by dropping a bomb on them... 
Perking would help because you wouldn't see an endless wave of suicidal Il-2s griefing gv fights. Right now, they don't care if they die turreting one tank/wirbel. They just up again and again to grief gv fights, die, rinse and repeat.
That's a completely different issue. If you want to discuss existing game mechanics that players can take advantage of to grief, you'd have a 12-page thread.
If we stick to the "perk the IL-2 because the 37mm guns are too effective...", it really boils down to the fact that GV's are now extremely vulnerable to an aircraft merely because of its guns. And again, I'll state that the best remedy to an IL-2 is a WW. Unfortunately, those players that have the desire can't shell the base from 3-4,000 meters and have the ability to shoot down planes, all wrapped into one single "Solopwnmobile".
Conversely, the IL-2 is not a "Solopwnmobile" either, as its extremely vulnerable to enemy fighters. This is exactly the same type of thread that we had just after the B-25H was delivered, and everyone was complaining about the effectiveness of the 75mm gun.
And, just like those sentiments of frustration, this too shall pass...