don't judge till you get to end game
I'm starting to realize a ton of people would be effed over if there was a skill tree and they were effing around with it, then by the time inferno comes rolling around, enemies are one shotting all over the place and they do near nothing to them.
It allows for experimentation, but now theres absolutely no reason to have more than one of each class, we'll see how it goes.
So it's not necessarily dumbing down, but I do see it reducing the rage later on (and you gotta admit, d2 characters where not at all complex end game, usually one skill spam, yet they were undeniably overpowered)