I think these are all good ideas.
I mentioned in another thread that it would be nice if the barbarians could all be one 'race' or you could say, type of creatures.
Now you have the Lizard folk and they are cool, but then things get strange as you have an assortment of orcs, humans that are supposed to be orcs (orc crossbowmen, chariots, etc.), and stuff like Lunatics, the OO units.
I suggested that you stay with the Lizardman theme and make all the barbarians reptiles/amphibians. You could have frogs/toads, salamanders, snakes, turtles, crocs, gators, gila monsters, Komodos...you get the idea.
Or, maybe I enjoyed "Snakes on a Plane" just a little too much.
If not reptiles, make all the barbs insects/crustaceans. Again, you could come up with some great fantastic creatures using these as your basis for development.
PS. Now that we have Moe, Larry, and Curley, we just gotta get us a Laurel and Hardy.