If the Etruscan League is an emergent faction and not the rightful owners of Arretium but some dissidents that may emerge of some reason or another, how come they become the owners of Arretium when the Ligurians liberate the city? Shouldn't a liberated city go back to the faction that owned it instead of to a group of dissidents? And how come you call the emergent faction the Etruscan League when that name is what people connect to the Tuscany area? The name Rasenna is less known and should probably fit more to an emergent faction. And as the name Rasenna means "the people" it would fit more to an alternative/dissident faction divided from the main faction, just like commoners are divided from nobles - The People (Rasenna) vs The Federation (The League).
Another thing partly connected to The Etruscans and partly to the mod in general when using the AFP submod. I know this is a Beta version of the mod and that the Etruscans aren't supposed to be played but you're kind to let us do that by using the AFP submod. I noticed there is no information about the Etruscans in the window for choosing a faction. I'm pretty sure there are other factions that aren't supposed to be played that have no information about them either. I hope though, and am certain, that you will add information about the different factions that aren't supposed to be played so we, who enjoy playing those factions, can get some background information about them.
That also happened in DeI 1.1 and isn't anything special for 1.2