Character with literally optimal gear can do content quickly by literally only killing 3 monsters (because killing anything else would slow it down so hard). Nevermind the fact that Barbarian is absolutely horrible until reaching that point for anything but "horking".Let's hope Blizzard doesn't take this as reason for why Barbarian doesn't need buffs.
Well his build also means the multidamage of beast + deaths deadly strike double damage and probably multying that with just max damage in general and amp dmg if u get one with Grim/Amp/Decrip. They can be super strong just expensive.