This is the fate of all MMORPGs. Each level is mathematically exponentially harder to attain. For example, I know that when I played Runescape... it took as long to get from lvl 98 to 99 as it would take to do lvls 1-70 all over again. The road to the top is fun... but once you get near the peak, it starts to become boring and repetitious. That's why I always find new games after a while.