As someone whom played Diablo Immoral for a short bit, I feel they’re nothing alike.
The rest of your complaints seem very subjective. I loved when the priest got absolutely murdered, and love the scenery, gore, aesthetics of it all. It feels like a Diablo game, and not WoW in ARGP form. Looking at you, you, horrible monstrosity of a game Diablo 3.
Can’t say much for the Barb thing as I’ve always been a Caster myself. But Sorc felt great even though none of the classes we were allowed to touch were anything I really wanted to play. Also, I have for once, in Diablo, actually enjoyed listening/watching the story unfold. But hey, that’s just my old a** subjective opinion. Hopefully you take more interest in it later, and if not… Well, have fun wherever.