they are fine atm not sure what you are on about "not making any chances to the problem are has with level 90 talents"
yes our movement sucks but you just gotta really know what fight you are doing then its all good, and besides theres not many fights that requires heaps of movement in this tier so far (go IW if there is heavy movement and none-some ROP)
they nerfed arcane jsut before mop hit and they are reverting the nerf, since fire and frost is on good dps atm
here is a question for you, have you raided as arcane yet?? personally arcane is fine just needed them nerf reverted