This is such a great mod, and so much time was put into it...But how come you didn't make use of the steppe terrain for a huge swathe of Eurasia? There was actually a vast difference between the plains of Lombardy and the 'plains' of the horse steppes.
I'm definitely going to make use of SWMH's map for my own private build-a-mod, but I am not looking forward to going through all those provinces and update them to 'steppe' terrain as they should be (I use a mod of my own devising which gives different modifiers to cities and castles based on the terrain).
Also. Ireland is pretty far from reality, terrain wise. It should be mostly hills.
And...The french have a huge -0.35 penalty to their knights. This is greater I think, than even the arabs get, or other cultures that I've actually in my own mod, not even allowed knights at all, in favor of tougher light cavalry. What's the reasoning for that? The Franks and the Normans were famous for their heavy cavalry.
That said. What mostly won me over was the amazing, and beautiful and I think, under-appreciated work done with the cultures of Italy and Sicily. If I could have dreamed a cultural set-up into existence, it would be the way you've done it. That was a real gem to find.
My main concern in the mod is actually the ease with which the Saharan desert can be crossed now. It's a hop and a skip from Somalia to Mali, as it were.