lets ignore the people that hate leveling, as you said if they don't wanna do it they won't. as for the "90% of the game is already designed" load of shit, most of it was designed years ago(TBC and WoTLK) and cata already proved they can over-haul zones. they are already doing technological leaps with connected realms and such. i don't think implementing what i said would be difficult, just time consuming. they don't need to do it all at once either. just over time, implement new small or large things in new area's. it is really not as difficult as you assume considering the technological advances the company has made.