Aircraft defence balance changes

I believe these changes make anti-air defenses less insta-win on placement and not so "one defense solves everything" anymore. Aircraft are given a chance to escape when they're placed now (SAM Sites used to 1-shot MiGs or level clumped aircraft quite quickly, so if you accidentally got in range you'd be hurting). If you still try to take defenses head on with aircraft, the aircraft can lose, which leads me to think the current defense damage was already too much.