While replicating the actual geography is very interesting since you can imagine you're seeing something close to what a medieval soldier would see at the battlefield level, in actuality there's something to be said for specifically designing the terrain to create opportunities to plan battlefield strategy. Many things are not readily apparent on the campaign map versus what they look like on the battlefield. Sometimes an adjustment might make the mod more fun or help balance things too.
One could very specifically design the terrain and create some winding mountainous passages that had to be navigated and hence create situations similar to the box canyons in the American Wild West where a few good sharpshooters could fire with long range rifles and cause serious mayhem.
If a map is a grid of only 100 x 100 (and all of the mods have bigger maps), and if it were possible to fight on each map coordinate (no impassable terrain)then there are 10,000 unique battlefields. Having looked at tons of these in mods and the vanilla map, you can't believe how many fun battlefields there are. Of course many of these are very unfair to one side or the other, but that's much more realistic. That's why you should not autoresolve but play those field battles, or at least save them to replay later.
'Looking forward to finding those in TOTEM.