So, here again, we put nabateans, sabateans and cartage in the same group, but we are affraid to do so with romans and greeks.
We put Aedui, getai and Sweboz and lusotans (hell, they even didn't speak the same language !!!) in the same group, but the same is not possible with Romans and Greeks.
Hayasdan, Pontos in the same group, but hey, they are all the same, those non-greeks and non-romans !
I won't even speak about Pahlava, which is quite a difficult subject because of iranian culture, comming from mede culture, comming from nomadism (probably) and parthian culture, an iranophone nomadic culture close to sakae and Sarmates. It is a very difficult subject.
But sorry, if you agree only to put Sabateans and Carthage in the same group, you can't deny that making a slot only for roman is ridiculous.
Unless you think that Rome is more important than Carthage and it hurts more to see Rome assimilated as something else.