I've got a monk a little bit under your barb in gear. Act 1 farming is fine for me I can face roll through most packs outside of arcane and shielding. I only see barbs having an advantage at tanking mobs with un-dodgable skills that you have to not stand in the fire. Act 2 is a crap shoot of hard mobs with even harder comps. Its really Imbalanced for melee vs Ranged right now. Range can solo in acts 2-4 no problem. I can just barely solo in act 2 and taking any kind of hits in act 3 is right out. I enjoy the difficulty it just bothers me that its not as hard for all classes. Range go around stacking damage and burn through shit. Melee need Hps,Armor,Dodge,Resists Range classes can get by with level 57+ with baller stats and melee need to stack a lot more.
The pro I do see to this is being able to make use of more stats I see end game melee being much more powerful in late Act 4 gear.
Long story short if you play through diablo 3 and hated act 1 re-roll a ranged class, because if you are melee you'll be spending a lot of time on act 1 and with the AH window open.