If I want KB I'll take a KB powerset. Don't make me waste a slot on something that's native to a few powersets.
As for the rest of you haters, I hope they never change KB. KB is a powerful control and a great tool. The problem you all have with it is that you don't want to learn to use it.
I had a Storm/Energy Def on Live who could tank a 50+4 ITF. He wouldn't have been able to do that without KB. And I'm not talking about Hurricane either, that's Repel, not KB.
The mobs go where I tell them to go, usually into debuff patches dropped by my team mates, but sometimes up against a wall or into a corner if they started all spread out.
KB is a tool, learn to use it.