I don't know if I posted it on here or gaf and am just repeating myself, but think it would be cool if they revisited what they did in Modern Combat.
In Modern Combat all you had to do was point at any other soldier on the field, press a button, and you would take control of that character. If you were a sniper and wanted to start flying a helicopter, look at your teammate's helicopter and take control of him. It felt a lot more like Battlefield in that it was a team effort to win the battle, even if it was you playing as the entire team.
also, fuck fuck FUCK the knife. It feels like I bought my knife at the dollar tree.