I hear there's a stat squish for the new xpac and it will be like wotlk stats... Idk about you guys but my 1 was the best it ever was back in wotlk. I'm excited and hopefully some good wpvp comes out of it for us!
I conjecture [miss/dodge/parry mechanics due to level differences] will still exist, despite the removal (or "removal") of hit/expertise. A level 60 character hit-capped against level 60 raid bosses (I conjecture) will not necessarily be hit-capped versus significantly higher level players/mobs, much like live.
Granted, that's just a conjecture on a yet-to-be-released expansion.