just spent the last hour or so scouring the net and it seems everything for arms points to colossus smash and not having that till 85 i feel like my worst fears are coming true......im going to become fury for a while...cries
there's a thread about this in the DPS forum so check that out, closing this thread. but to answer your immediate questions.
'strike' sucks as far as i can tell. meant purely to give leveling warriors a new move
colossus smash is supposed to be our bread and butter move, especially since sudden death now procs that and not execute. but you don't get the move until level 81. So we basically lose execute out of our rotation, and gain nothing to replace it.
you can turn off the abiilty cue by pressing esc (or whatever your blizz menu default is), interface, action bars, "secure ability toggle", turn it off.
on the boss test dummy, after regemming (gah costly), and reforging for mastery after hit/exp caps, i was able to do about a consistent 5k dps on it. hopefully in raids this'll go up, but that's still really abyssmal compared to pre-patch and the casters in ICC who are doing 17k+