I don't understand why all this QQing.

If you're unhappy with endgame content/speed atm then stop playing.
I myself don't stop at lvl50, I've farmed my Darlight set and am now doing my Relic weapon quest, while also farming my af2 and after that I'll do a second job to lvl50 farm af2 on it too.

While I'm doing that I'm also lving my craft and gathering.

I'm far from done, so yeah there is allot to do.
Those who ding lvl50 and cry because it was too fast can go play slower leveling games imo.