After browsing some bf3 forums I have discovered a trend.
People with k/d>2.0 will say things like. "the Famas is op, the MAV shouldn't be able to kill people, frag shells are op"
People with k/d<2.0 will say. "helicopters are indestructible, stingers are useless, engineers are useless"
Dice is in an impossible position and can't possibly create a patch that appeases all players, the best they can do is decide which group of players is more important financially to please and then do that.
Personally I can't complain, I kill people the same way I always have and die just like before. Conquest **** is fun and I'm shocked at how many people are hating it considering how similar it is to regular conquest. Just my observations