Not at all , you create zones with all elite mobs that drop rare resources required for recipes that only drop in dungeons raids in that area . The gear would scale along similar lines , but you would not be solo farming in these areas . For example , after you are 60 and have some MCBWLAQ gear you could probably kill mobs in a small group of maybe 310 players , going in lesser gear or less players would increase the challenge , it would also offer small group world pvp zones rather like a constant AV . There are many ways to scale difficulty through resistance gear , mobs with higher hparmorresistances and on the difficulty of trash from Naxx or AQ 40 . If you think outside the Blizzard box there is potential to make a fantastic and dangerous world without ever increasing the level cap from 60 . By increasing the level cap each expansion all you do is make older content redundant , a lvl 62 green weapon has greater stat allocation than a Naxx drop , yet that can be picked up as a quest reward or a loot drop , just 4 hrs into the next expansion all your hundredsthousands of hours raiding is obsolete .