Whitmire
Recruit

I suggest adding some more rough terrain that stops horses or is even dangerous to them. In reality, you wouldn't ride your horse carelessly in rough terrain, because even a simple hole in the ground might break the leg of a galloping horse and send you flying.
Even if you don't fancy the idea of adding damaging terrain, add some terrain that stops horse movement (like pressing R does). There are trees already, and some really high elevations sometimes stop the horse, but there should also be boulders, tree stumps... That way a player would have to be more careful with their horses, especially when engaging in mounted archery, and there would also be more places to hide from enemy riders.
And hey, where are the swamps? There should definitely be some marshy terrain.
And some dense forests, please.
Even if you don't fancy the idea of adding damaging terrain, add some terrain that stops horse movement (like pressing R does). There are trees already, and some really high elevations sometimes stop the horse, but there should also be boulders, tree stumps... That way a player would have to be more careful with their horses, especially when engaging in mounted archery, and there would also be more places to hide from enemy riders.
And hey, where are the swamps? There should definitely be some marshy terrain.