http://forums.taleworlds.com/index.php?action=profile;u=99364;area=showposts;start=15
It was more about the current situation with the Iberians mixing references from different cultures and peoples. Notably the Iberians have Viriathus as a hero. I suggested in the past either to make at least two different civs or to more clearly distinguish the other peoples in the Iberian roster and building tree.
Edit: Different approaches to the problem