Given ARMA 3's timeframe something like this would probably be realistic. If BIS officially added this it would also allow modders to easily add these systems to their mods.

ACE2 could not simulate the angle of the hit to my knowledge. BIS really need to implement this feature, right now tanks are a joke. There are games from the late 90s with armor perforation modeled so the "hardware requirements" excuse wont work.

A functional targeting pod is critical to a modern game like this. I don't think that can be stressed enough.

It's also pretty annoying when they explode because you hit a fence....