And then theres the fact that Tibet and Dali dont exist... the Mongols did take over Dali, and while you couldnt attack Tibet (lets say theyre surrounded by peaks), it would be good to atleast being able to vassalize or trade with them. Java, Japan and Vietnam shouldve been in as well. But I guess that would be too many civs, probably the reason they arent in. It would round out all of the civs the Mongols had contact with.
When I learn how to mod I might actually change it...
And I guess since Islam had such a big presence it might be a bit imbalanced.
It was a fun scenario though.