But what about Cartaginensis and Gallaecia? Shouldn´t they to be kingdoms? It just seems wrong with only 3 kingdoms in Hispania...
Yeah, if we're going by Diocletian's division, Cartaginensis and Galleacia should be separated from Tarraconensis, if you're willing to push it far, I'd say make Tarraconensis the king tier one, and then Cartaginensis and Galleacia duke tiers, but kingdoms should be the fair thing.