The people complaining about this are morons. Yes, it should only be applied to heavy/unbalanced/very long weapons (which cmp said he would address). But helicopter swinging SHOULD have been nerfed.
You shouldn't be able to thrust a pike, and lol-spin your mouse and do massive damage to anyone you connect with (not to mention anyone in your circumference would be able to be hit so you don't even need to target someone). This was also able to be done with the great maul. After it was already "in the ground" (animation was basically finished with the overhead) you could lol-spin and anyone in your spin radius was still able to be hit (and you gain a speed bonus).
This was a problem, and I'm glad they addressed it. You can still jump, lol-spin, and stab if I'm reading into this correctly...you just can't jump, thrust and then lol-spin.