Eh, I've tanked every dungeon and every mythic boss on the beta server with my DK and I didn't miss a single thing. The rotation feels largely the same. So instead of either using HS when there's 1-3 enemies or BB when there are 4+ I'm only hitting BB now. Is that really something for people to get so mad about?
I guess I'm just interested in other things than what animation my character does when he's hitting a boss.
For me it's not the animation, it's the fact that the class is based around being melee and having a big bad ass 2 hander... now that weapon is just there for show and you're a second rate caster in plate