As for Numidia...again, a faction with a lot going for it...but, the location of Carthage and it's regions, the typically poor performance of Carthage, the poor use of naval vessels in RTW, coupled with our desire to make Carthage a viable enemy of the Romans, all contributed to the removal of Numidia because they would provide an unwanted distraction for Carthage, as well as a balancing act to try and make it so Numidia didn't snuff out Carthage, or so badly damage it that they were of no threat to Rome. Even as it is, they are still not the threat I would like them to be.