Multiple times while playing I've had a situation where I had to warn someone or nobody noticing a flanker etc, and not having the time to type in chat due to cqc etc.
So I was thinking why not have a kind of marking system like in Enlisted or Rome 2? Where, say if you press v while pointing at a specific area, a marker will appear on the map, or maybe even in the actual game with a little red triangle. By this I mean, the same way you see a username once someone dies, a little red triangle that you can see while playing.
This would also allow for more coordination, and another feature could also be implemented that, if there are any points, they will point and check that direction, so they don't just walk around.
I can see there are several ways to troll with this, so to prevent this as much as possible, you can only ping once at a time, that is v to mark and v again to unmark, and something to detect whether you have pinged more than say 15 times in under a minute and then remove the feature for that player for that match or a period of time. Also, maybe if it goes past a point, this feature could be removed from guests, though I don't think that is a good idea, as this provides a way to coordinate with them and get them more involved, which is harder since chat was removed for them.