I was in arena a few days ago, and fighting against a ret paladin.
All was going well and we were about to get the kill when my death coil was reflected... it cost us the kill and eventually they won.
It just seems pretty unfair that a passive gem can determine which team wins an arena match. Couldn't they possibly change this to only reflect damaging spells/non CCing spells?
If not, how about just for arenas..