Just a small detail but it would be nice if the insignia for ranks reflected the army you were playing with. No other army uses the American stripe system, so for example if you're playing PLA, and someone looks at the rank next to your name, it should show the PLA insignia equivalent of your rank.
If it were changable it would be great. If you get bored of your regular USMC corporal badge make it a MEC badge or even a PLA badge, might even keep more people interested in the game...for about 5 minutes anyway...but hey thats still good:P