Interesting to see how they change haste for warriors indeed.
I, personally, would like seeing crit>haste>mastery for fury (already is for arms)
Haste>Mastery was NEVER the case for Arms. This misconception was most likely a result of bad programming, lack of analytical insight, incorrect rotation logic, or failure to realize Arms' shallower Mastery Conversion. In fact, Mastery was around 60% better than Haste.
It might be that haste's value got up on sims for some characters because how bloodbath and weapon enchants work. In reality I can't see how haste can be any better than mastery, when it scales so horribly itself from the haste rating. Not that mastery is any better for Arms, both feel so empty as stats on gear.