A few quick notes:
“Change Charge on 4-Piece to Weapon Throw”: well, this a) ruins Vile Charge, which I’d say is bad, and b) just sets up an IK6R4 Weapon Throw build, which will either be OP, or too crappy to be worth playing.
“This build will be weaker than other top Barb builds”: pretty sure he’s wrong about that. It just hasn’t been played enough yet. And, as various people have noted, it has a steep learning curve.
“Barbs will be the only class without an S tier build”: lol, what? With this, Barb will have 3 builds that are really pretty damn good, especially with the GR changes. What builds might be stronger? LOD WOL, yes. Twister wiz, yes. Inna, maybe, depending on if they nerf it again. Marauder, maybe. Crusader…WD…Necro… I don’t think so.
“You might not have WT on the bar for pushing”: what would you take instead, just an extra shout for minor damage or toughness? As opposed to a 2.5x multiplier vs bosses and elites? Sounds like a bad plan.