The switch from the Seleucids to the Romani isn´t only a problem about graphics and audio.

The game engine still considers the Romani as belonging to the "greek family". That means the Romani don´t get a culture penalty when occupying a greek city. Conquer the Epirote city Taras and you will see it.

I´ve mentioned this before in another thread but I am not sure if anyone has taken notice.