first, i would like to see Numidia. it was one of the key players in Punic wars. and certainly if we have Iberians as a faction we should have Numidians who imo were of more importance.
second, Galatia. beside historical reasons it'd put some preasure on AS's presence in Anatolia and will help little kingdoms such as Pontus, Armenia, Pahlava, by redirecting some of this beast's attention.