We did not add new factions (as I am not really sure it is possible )

What we did is that we handpicked the generals for a certain region. For Illyria we added RTR blue genera, (or RTR illyrian general), for Attalid kingdom we used RTR macedon general, for Crimean one we used other.. etc...

See, we might try to implement new faction for EB 11 if alexander allows it (to tell you the truth, I belive no one yet even tried to implement more factions into ALX.exe based game )

Anyway, we wont use RS legions.. or not yet, I very much like the EB ones
Why are RS legions better?