Epic War Age (EWA) - Adapted Mod Collection

In my opinion, the only logically sound option for a new faction is a water castle or a swamp "fortress"/naga (one or the other).
Everything else is far-fetched. The Factory and the Conflux are two sides of the same coin (both are equally bad).

I agree, what's wrong with the old cities? It's okay to add something, but replacing them entirely – unless it's for a couple of games just for variety. Naga are, let's say, the official inhabitants of Ashan, the second "lore" city missing from the game is "Free Cities."
And yes, you can at least make individual skirts for each hero; I don't know about units.