This game is fantastic. The multiplayer is really fun, and the way the weapons work and reload are the perfect balance.
My suggestion would be to make it easier to see who is speaking, maybe with an optional popup in the corner. When someone talks to me, I'm never sure who it is unless they are in my direct line of site and I see the speech bubble.
Overall, though, this has become my favorite OQ2 game. Perfect for a quick lunchtime attack!