I understand what you mean, but I'm afraid I'll have to stick to my concept here. The idea is to make a map that focuses on the Mediterranean region. This means Greek and Phoenician city states along the coast, and the tribes they traded and fought with. During the last part of the period covered by the mod, Iberia did play an important role, but for the most it was just a coast that the Greeks and Phoenicians sometimes bothered to colonize. The Carthaginians didn't care much about the Iberian tribes before the Barcids conquered the South. Even then, they never controlled much more than the area covered by my current map.
Personally, I think the Second Punic War can be well modelled even without a third layer of provinces. The route of hannibal's march, as well as Scipio's, is within the boundaries of my current map. Hasdrubal did have a little adventure outside these boundaries, but his march wasn't very interesting anyway. Or rather, it became interesting when he was defeated by Scipio, but Baecula is luckily within my boundaries.