Here is the next iteration of the Barbarian (Stronghold) town, laid out similarly to the latest version of the Alpine (Fortress) and Sylvan (Treetop) towns. They don't have any revolutionary mechanics, just abilities like Scavenge and Enraged that make them tough and resilient. In a way, they are a polar opposite of Sylvan. Sylvan don't have any melee units until higher levels, and Barbarians don't have any ranged units other than Cyclops and its derivatives.
All these missing slots are to be filled or your iteration simply denies their existence and they're only there as a comparative between other factions?
"There’s nothing to fear but fear itself and maybe some mild to moderate jellification of bones." Cave Johnson, Portal 2.
I use A4-sized MS PowerPoint templates that fit 16 images. Often I don't use all the image slots. It's just easier to post them as they are than to remove unused image slots. There's no plan behind this madness. Just pretend that they are not there.