I agree with all Zujilin suggested except about khitian healers.
We have already Bear Shaman for khitans and removing the class can create many issues. So I would keep Bear Shaman for khitians but I would add a second healer class (we can call Priest of Yag-Kosha) with the same spells of Priest of Mitra, just changing all the occurences of Mitra in the spells with Yag-Kosha, like Zujilin suggested. It should be a modify not difficult to do cause it’s only cosmetic.
More about this suggestion below.
Definitely, imho, the lacking of a khitian specific healing class (cause the original 3 races have all a specific “cultural” healer) is a flaw of the expansion. Excluding the creation of a new class with new spells (an option that Funcom had to consider when launched the Rise of God Slayer expansion, but not viable now), Bear Shaman, among the 3 existing classes, never seemed to me the best choice for lore. Bear Shaman can fit Hyrkanian culture, but khitians should be mainly the people living in the Empire of Khitai, so it would be nice having an option more fitting this lore.
Avoiding Tempest of Set (too stygian specific imho), Priest of Mitra can easily be adapted for khitians just changing the name of the Mitra with Yag-Kosha, cause the two cults are not so distant. It would be awesome something related to Yun (definitely, for me, one of the most interesting factions), but that is a death cult and a priest of Yun with the same spells of Mitra… I don’t know… it doesn’t sound right.