The thing that comes to mind is healing stream totems, also Blessing of Wisdom and Mana spring. If those get axed that would, well suck.

Thankfully this is only limited to buffs and debuffs. If they did this to DPS no more focus fire. No 16 insta cast dots, no 5 x Chain lightning. would also be a pain in the ass for arenas if 2 people play the same class. Just count our lucky stars on this aspect.