Using my 2h, I can hit just as fast as my polearm guy by turning my stab. What the animation change balanced out is that I'm not able to hit at fully extended range with my 2h lightning fast.
And I honestly consider that a fair tradeoff BUT, I think 2h in general should get like +1/+2 pts of stab damage. Some of the glances against heavier armor are quite silly, but then, armor is OP in melee atm imo.