End game is level 50, we are yet to see what there is to do at end game. Not everyone will like this game and stick around, that is personal choice. The game is still evolving and improving with each update. Once the content is added, you think the devs will just stop and sit back to relax? I don't think so. I think that will be the time when we see some major changes and improvements to certain aspects that need attention.
Just enjoy the game for what it is for now, watch it evolve, help it along the way if you can. If people quit, then so what? that is normal on every game ever made I think?
New players will join, old players may return, we are in at the start and part of the Eldevin journey... enjoy it!