I think the game is worth my money so far. And is refreshing in ways Diablo 3 and PoE are not anymore. The campaign was pretty good, nice story, good CG, nice voice acting, ambiance, etc. Furthermore, having harder bosses in comparison to other games of the same genre is quite nice too. Expect bosses harder than elite packs for a change.
The endgame still has issues. The way I see it, there are still many balance issues with the game that let players mow though content way faster than they should. My personal opinion is that the game needed much more testing and balancing before official launch. Why people think they are entitled to be able to do almost max level content after a couple weeks with unperfected builds and far from optimum gear is beyond me. But it is understandable that if something is taken away from you, even if you know deep inside you should not have it, still hurts. So you should expect a lot of complaints and outrage from the community right now, specially from the broken godly build guys.
That being said, the endgame nows feels much like Diablo 3 PTR to me.