so is this game better then diablo 3?

I don't think they should be compared as they aren't really in the same genre. Path of Exile is an ARPG and Diablo 3 is more of an action game.

It seems as though they didn't really know what game they were making, you can't make an action game and have the same kind of content as Diablo 2, because its no longer an ARPG.

While they could have added more content like endless dungeons and other shiz like that, I think most of us would still be disappointed because at its core its still an action game, and we were all expecting an ARPG.