Lack of faith. I think wow would be great at 60 levels again. It would be cool with the new level stuff, as certain races can keep consistency with the lore too. (IE Draenei start in BC but then go to Cata, back to BC, to WOTLK, back to Cata) etc.
DK’s/DH’s could interact more with lower level people too.
it wouldn’t really be a problem if blizzard didn’t mass produce expansions, and instead spent 2-3 years really fleshing out expansions. we could still be in MOP right now if they did things properly.