A good idea is to have tactical team chat or speech bubbles appearing over your head. In TF2 simply pressing Z,X,C will give you options on what you want to say. This helps rather then typing your whole cry for help and not only that but it could show proper grammar. Rather then having people type
''OMG WTFBBQ HALF MEH LOLOLOLOLOLOL 2BAD I IZ DED''.
Having this would result in easy to use quick swift team reactions and help towards your teammates.
Whats this though? You still don't understand the idea? Well lets simply this shiz.
When selecting Z,X,C you will get a list of phrases. on choosing one with the number 1,2,3,4,5,6,7,8,9, and 0 for canceling in the chat bar in your teams color you will get a phrase like
''Fall back''
''Need backup''
''HELP!''
''Charge!''
and ''LOOK''*
With this a small speech bubble appears over the players head showing an image to relate to it. Now with the phrase look it will instantly say a phrase for what necessary object is worth looking at like The resupply tent, The Intel, dead enemy, dead teammate, and living teammates and living enemies.
With something like this the game can be a lot easier for players to do certain things if its a fast paced or slow and tactical game.