Just wanted to post some observations that I have noticed. XAi 4.0 combined with KGCM has definitely made some huge, noticeable improvements

1) Mongol playbalancing seems to be at the sweet spot. Not too overpowering but not just lingering around either

2) Egypt was finally able to take Jerusalem in a Jihad. I have never seen that before in a mod. Several turns later they declared a jihad on Constantinople! That's never happened either. I ended up losing and just reloading an old save but it was still one of the most fun experiences I had

3) At times AI almost seems human in a Machiavellian way. Venice and Hungary were both at war against Sicily. Venice only had two settlements left but they were very rich. Hungary had a lot of settlements but was bankrupt. I barely noticed it but acouple of turns later, Hungary gave some settlements to Venice, got some money in return and the two became allies. Very cool