Like the having to target a area of the gaming field in order to use it (bound to middle mouse button). Having it just use another on target select removes some of the interaction with the environment / encounter that Kolto brings vs sitting there clicking away at unit frames. Gets even more fun in 8 / 16 mans as you need to keep track of where people are in the field more to use it. Oh player 6 is low, he is around player 9 who is also low etc. Boom fire away. I love even more seeing people running around, soon to converging on a spot and firing it their direction.