Just my $.02 on this.
I argued the collision angle from a realist position. In the real world, anytime there is a collision between planes there is shared impact damage. The extent is immaterial, they both suffer some damage. In AH that will not happen. Hitech has spoken and stated he will NOT change the collision model. He does not want to have players deliberately ramming, not that other forms of suicide attack aren't allowed.
I felt that a collision should be modeled as in the real world. You have one, both planes suffer damage, period. Lag does have an impact but it still seems to maintain a fairly GOOD ratio of shooter vs shootee results. Collisions should be held the same way. Right now the collisions are one sided and some have been able to figure a way to work them to thier advantage.
You pays yer money and you plays the game. If this issue is your only squeak, then I'd say your money is still well spent irregardless of the lack of real world accuracy.