>recording lines for the machu language is too hard
>reuse chinese building assets and voice lines for all the new "civs"
>15 campaign missions, 3 of them reuse the same map
...
>record voice lines with recreations of extinct languages like Thracian
>record different voice lines for civs that speak the same language with Spartans, Athenians and Macedonians saying different things
>two new unique architecture building sets for the new factions
>unique soundscape for every civ, soundtrack even changes mid scenario