maybe im playing my barb wrong but, aside from refreshing sprint i just hold down the WW button and WOTB when i can, and or give myself the crit buff if it fades, its definitely not something that requires skill maybe a little more attention is all.I think a monk is "easier" to solo with, in the sense that you pretty much auto-attack to kill everything while making sure to refresh your supporting skills (sweeping, mantra, flash, etc). You can be pretty lazy with it and still do well. A WW barb is the most efficient build, but it takes a lot more work to play it well and make it efficient.
I personally prefer a Seismic Slam barb because it is fun for me. However, it is much less efficient than a WW barb.
Oh and overpower