I'm liking the game quite a bit. The only downside I see to it are tech related like the occasional random crash and on my rig it seems to stutter a bit everytime the environmental music initialy loads.
To say that this game was unecessary is to say the same thing about any other genre. Don't cry 'cause it is very similar to Diablo. It's no different than bitching about another 1st person shooter or another RTS. Sometimes it doesn't matter if it is the same, as long as the developer added some fun into it. This game IS fun. I'm having a better time with it than I did with Dungeon Seige 2.