The campaigns should show the representative period and branch for each civilization in the game. It seems that Indians in the game is represented by Rajput people in the 12th century mainly, and Slavs in the game might be represented by Rus’ people.
So, the war elephants and the cavaliers in Prithviraj’s campaign are ironic. Actually, Indians is more fit with the war elephants than Persians. they should be the UU of Indians instead of Persians, and Aswaran is more representative for Persians than the war elephants.
Then, almost every Saracens player uses the foot archers or the cavalry archers, it needs to make the camel riders useful again.
Btw, Pole is worth being another civ from Slavs. Pole had the szlachta instead of the boyar.