I'm sure I will have more feedback later but after a few battles one thing really jumped out at me.
Combat speed is too powerful. My sovereign on a horse can attack 3 times or attack and then retreat. She can also cast 3 spells in a single turn. This is way too powerful and will end up making things unfun once someone gets a strong unit you are unprepared for. Really need to decouple movement speed and number of attacks.