1. In first screen of Rome 2' Units Cards (battle of Teutoburg Forrest) is
Greek ceramic style from archaic age (8th-6th BC) but 'Rome 2' is in Hellenistic times (from 3rd BC to later), so this style is completely not historically.
2. Hellenistic period (
ages of Rome 2) has other Greek style of art -
colorful and more realistic bodies, faces (3d structure).
3. Why Greek stlye for Romans?
Name of game is ROME 2. Why Greek art for all units cards? Romans have other style, similar to Etrucans and Samnites - similar to archaic Greek ceramic but colorful... Later they had more realistic and colorful paintings (3d structure).