Haste is gimped everyone.
Here is how to use hast
1. hit hast then use combo for max damage
here is how NOT to use hast
1. do combo starters
2. hit haste
3. hit combo finisher (notice the damage increase is not there)
the best way to compare is to place a high weapon damage weapon on your barb, then strip your barb butt naked in front of a straw man. That way all your damage comes from your weapon damage. Then do upheval. Look at the point where your damage is lowest. (it is the hit toward the middle of the combo) You will see a big difference when hast is applied properly.
Point is that it would be much better if I could use hast during a combo finisher. still tollerable if i could do it AFTER combo starters. But before anything and it is just a movement buff that I can increase one combo damage with in most cases.