Back in Halo, knowing who's explosives were who's didn't matter, because they blew everyone up all the same. In Destiny, this isn't the case. There is no friendly fire. When I'm in the thick of it, I can't keep track of who's throwing what. Many times I'll walk into a vortex thinking for sure it's friendly aaannnnnd then I'm having my soul sucked out of me. Many times I'll hesitate, thinking it is the enemy's, but it's my team mate's and I die because I second guessed. So I have a thought. What if the abilities were color coordinated in Crucible so one can identify if it is hostile or friendly? Friendly trip mines become blue, are red if their the enemy's. Hostile nova bombs are crimson. Hostile shock grenades are bright red. The general rule being blueish means friendly, and reddish means hostile. I think that would be real helpful.