More visible teammates.
Anyone who has walked through the woods with someone knows that it is pretty easy to keep track of anyone in sight range. In fact it is hard to hide your presence. Video games lack the natural things like audible indicators of direction (I'm over here"), peripheral vision, and other cues that we take for granted in real life which is why they should show names of teammates at a much much larger radius. Teams that just like to play and have fun together have more fun if they can coordinate instead of constantly spending time figuring out where everyone is in relation to each other. I'd rather err on the side of too much team info than not enough. The names should disappear when crouched (stealth).