OK, status update on 4x barbarian.

As I expected, it is pain in the ... to manage barbarians with furious charge without cooldown. Crusader was mostly worry-free experience (they always moved in pack), with barbs it is no longer the case.

It is quite possible I will be able to figure out some slower build with some decent AoE (a-la Condemn or Steed Charge), but decided to try Monks for now.

On other hand, rest of the skills (damage boost, shout synergy, etc) is great.