Can't believe I've missed this topic.
Yea! Colored flares!
In fact, I want to push for a little flare specializations.
Flare is one of only two utility gun in the game. Instead of creating more utility guns, why not let certain ammos do certain things on a flare? (and make gunners more valuable?)
I've expressed this before, but...
Burst should cause fire work. Lesmok should shoot through clouds and explode at max-range (distract the enemy). Lochnagar should kill a cloud. Heavy Clip should turn flare into a linear beacon which, when it strikes an enemy, relays back the distance (like the range finder). etc. etc.
If this can't happen, just give me colored flares. Aesthetically pleasing, and can have some tactical communication uses. (say, on crazy king, make it look like red team has capped a point with a red flare, when it has not).