I don't know massive amounts about the endgame but from what I hear it is a lot more casual. Now don't associate this with the negative casual of wow, by casual it is more relaxed. No need to lose your life to complete content, content is tailored toward people getting to see it. So whilst it is a challenge there is no cheesey gimmicky crap modes to bash your head against it is a lot more story driven (please correct me if I am wrong) there is sn element of grind toward the end but tell me sn an mmo without it.
I'm an ex wow convert myself and inlove the game. Gameplay is fun, quests are much more story driven so whilst there are moments of grind it doesn't really feel like it as there is always a reason. Community is amazing, the polar opposite to wow which I love.
Get a trial and come join us for a while mate, the worst that can happen is that you won't like it but I think you would be pleasently surprised.
Let us know on here if you are coming for a trial and we will get you on board with kin and give you a hand