Biggest and most fair problem you folks seem to have is related to town names. I was on top of it for quite some time, but during the last phase while balancing out trade routes and faction interaction choke point I messed up some of them. That's completely on me. It is a very easy thing to change but it also comes with risk of breaking save games, so unfortunately we are stuck with southern sargot for now.
apart from that, the main change is water masses around the map, and more prohibiting use of mountain ranges and rivers. apart from being visual elements, they are also most important tools that we had to crate natural boundaries that would be more believable. Beyond that it also give us more opportunities, and most importantly give you the players more sense of a journey between rivers and canyons and valleys instead of double clicking (or click+3) straight lines between cities.
Though there are limits, and decisions we made along the way, like varcheg being a sturgian town, and pravend in relation to it would not be neighboring towns like it was in warband.
one last thing, the anatolia comparesent, I was not here when warband map was made, but for the new one and the onld and to some extent warbands map, I can give an insight. Yes being a turkish company we surely did even if only unconsciously did took inspriation from the land we know, but thing is anatolia with its posisiton that sits between three continents, having 2 different coastal climates one being mediterenian other Baltic sea like black sea, to the west mountain ranges that allow sea winds to penetrate deep into the land similar to , while in the east great and high mountain ranges, similar to urals, and in the middle steppes that are reminiscent of western asia steppes, Anatolia is kinda a micro Euroasia.