Two Ideas.

First suggestion, Putting other kinds of grenades((Flash/Smoke)) in the Alaska Elimination map.
Second suggestion, When you get shot and your hitpoints go down you still move as fast as the people that are at full health. Well, I think the lower you get in health the slower you should move; To make the game more realistic.
Third suggestion, Increasing the amount of Gp you receive after games as you get higher in rank since you no longer get Gp from being promoted after a certain rank; Just to make it easier to buy weapons at a high rank. I've noticed that once you go through an entire Team Death Match you sometimes get enough Gp to repair your weapons and have 1-20 extra left, Or in Elimination Matches you get 1-90 Gp as weapons cost 30,000gp this would take a very long time to save up.

I'm not sure if any of these have been thought of yet, but these are just some thoughts I had.