This iteration of Barbarian is not the actual release version, it's an old version. This was confirmed by a dev. Beta is currently testing endgame with what is supposed to be the release version, and evidently it is not anywhere near as weak, and is actually very strong endgame.
As someone else said this beta was about who's going to play. Literally how many clowns can we fit in this car. Load it up til it breaks. They know which classes sucked in this iteration, and the v2.0 are already being tested by the real testers, not by a bunch of chicken sandwich buying mofos.
All I am worried about is that instead of lifting classes up to the bar, that the lower the bar, and nerf the shit out of the supposedly OP classes. I like my melee rogue just where hi is powerwise.