I posted this in another thread, but this one seems more relevant. I think there should be a spotter medal as a reward for those that sacrifice kills in order to help the team.
Spotter Medal
Image: Possibly the Recon medal from in game
Reqs: 2000-3000 assist dmg from spotting/tracking enemy tanks, survive battle. Repeat 5 times and post screenshots. Possibly add tier of tank requirements as spotting as a tier 6 in a tier 10 battle is way different then a tier 4 in a tier 4 game.
Just a thought, haven't seen the idea being thrown around, but I apologize if it was already discussed.