Great question, not sure I've figured it out yet either
I put charge where shield block used to be (2). Aside from that it's pretty much the same. I did move cleave up to my lower left action bar as 7, and stick shockwave in it's place as 7 on the main action bar. For the time being I don't have last stand keybound, since it got swapped with berserker rage. I'll have to figure out what I want to do with it.