The biggest problem is there is no end game. Its the pit and thats it. By the time your build is about half to three quarters finished everything in t4 and every other activity in the game is trivialized. So the only thing to do is continue farming increasinly easy content as you finish your build. Then the only thing left to do is the pit, which to me personally is boring as hell. Same on level 1 as it is on 150. Its decent content for farming or leveling your glyphs. For it to be the be all and end all while everything else in the game is roll your face on keyboard easy does not produce any longevity.