Just 'finished' a play-through in Western Africa. Was using an earlier beta-build+swmh+VIET's portraits. Sharing some observations:
-Ultimogeniture was still available to pagans
-AI lost some defensive wars because instead of defending, he tried to march his armies to my capital and lost almost all his troops to attrition. (Probably an issue PB can't fix)
-At one point (Late in the game) I've decided to invade Sicily. I was gathering my army (it took a while), in the meantime the Sicilians and their allies had a 60+doomstack waiting for me. Unfortunately by the time I -did- land the doomstack got reduced a lot due to attrition. Again, probably not something PB can fix.
-Those cultures in the sahara sometimes have european building-graphics
-HRE is oddly stable. They lost Italy as advertised, but then incorporated Hungary, England and Sweden as whole kingdoms. They lost England entirely, lost Hungary for a few years (but reclaimed it)
-Ilkhanate was....outrageously stable. They claimed the steppes, persian empire, arabia and Byzantine Empire and are holding this all together still. Despite having several king-tier vassals of wrong culture and religion.
-Any chance Ilkhanage can be prevented from warring for the kingdom of the Kipchaks so that it goes into persia? And Golden Horde should not war for Khiva. I pity the Horde, they got stomped by Ilkhans and are now limited to the Kingdom of Perm, doing nothing.
[May be increase the chance of factions declaring war if liege is in an offensive war, reducing it if he is at peace? Indep-faction should also declare war in case of a defensive war, since they clearly don't care. I had a good deal of faction-strife in my empire, and I actually had to surrender to the enemy I was attacking and pay reparations due to a rebellion which I just barely crushed.]
And at last, very enjoyable game. No crashes, no glitches. I love seeing the traits limit your ability to wage war.