I was thinking about how teamplay might be improved, as well as how CTF could be made more fun.
Tell me what you think, maybe it's a dumb idea ;P
The idea is this: there would be a weapon which would be held by all players, and would "mark" an enemy FC. When an enemy is marked, they would show up as being somewhere along a red circle, shown on the minimap. This wouldn't be very helpful- but if three people all marked the FC, it would track the FC until the mark wore off (maybe 30 seconds), because the circles would converge at the enemy FC's location.