I'm not impressed.
The first video they published of the Barbarians and Witch Hunter gameplay filled me with doubt, but I thought 'Oh well, we'll see what they do next'.
They added the Wizard, which was ok even if waaaay over the top.
They added the Monk at which point I grabbed my head in despair and asked aloud "What the hell are they doing to this game?"
And then this... See, when Maiev from Warcraft 3 had the Fan of Knives ability, it was cool because you could actually count the knives and it did look as if she was throwing them. Here, a friggin CIRCLE of knives appears immediately and for as long as the ability is being used...
I don't mind the grenades, though the Uzi Crossbow is very silly. I never liked the fact you needed Quivers in Diablo 2, but Diablo 1 did archery very well - equal parts realism and fantasy, which made for a gritty game.
Diablo 3 looks very grim (and I don't mean the graphics and atmosphere). Sure, I'll play it, but I keep asking myself why they are doing this to the franchise...