I think they should change aspects to give utility only,aspects should not directly influence in DPS, because then there will always be the "right choice".
My expectations:
They keep aspects, and come up with something to make it interesting;
They change how each specs works (although they already said they'll do it), i think that BM should work a bit more like rexxar, summoning and using wild beasts to fight, more abilities like Dire beast and A Murder of Crows could work well with the spec;
They make our abilities scale better with crit, mastery and haste.