Area that was biggest waste?

Talking about adventuring, something that maybe killed it: may be the fast lving, before big bang it was really slow to level up, so people would explore more, and do more quests, since slowly leveling in griding isn't really cool, but now people level much faster, some may get 100 in 3 days, and if the person went explorer 3 or 4 cities, would take longer, like: people go to the Romeo and Juliet PQ and they level super fast, the place is really good, but i don't like that because the peoples that level in there start in lv70 to 140 i guess or 130(if not more), so they won't know much about lots of places(like Mu Lung, Nihal, and other cities).