I forsee battlefield 3 looking much like cod 4 in the sense of realism. I hope jets/helicopters are more balanced so that even a noob could have a slight chance of killing it.
i like bf2s rank system, but you should get pins like you do in 2142 for getting a 5 kill streak, 10 kill streak, 4 titan guns destroyed, etc. As well as the squad order bonus that 2142 has when you perform a action inside the radius of the squad order. Those little bonuses really help your score i think.
they should make engineer/anti tank one kit also i think..aside from minor things like that i want to see.
more even balanced maps. Conquest assasult maps are gay where one team gets 1 flag vs 5 flags. If your team sucks it gets frustrating getting killed as you spawn half the time.. i like maps that start each side with 1 flag.