Maybe I'm just a lame and don't love this game for the same reasons everyone else does, but...
I'd like to see three/four things for the next M&B game. Not necessary, but it'd be nice:
1- I'd like to explore from down on the ground for once. That... Or make towns bigger so that you can actually ride around them.
2a- I'd like to have other things to do. Like... You could be a merchant, or a tourney-man, but... Maybe I wanted to be a black-smith with a particular flair for sword-play. Or an archer who makes his living off of difficult targets. Maybe an assassin, thief, spy, etc.
2b (related to 2, so...)- I realize the end goal of the game is to take over the map, but maybe we could do that in a number of ways instead of just conquering everyone. Maybe I can just make my kingdom look really prosperous and everyone flocks there instead. Or I could send spies to other kingdoms and tear them down from the inside.
3- Villagers should probably have their own, daily schedules. If what I saw in those screen-shots is what I think it is, then this might just be a pointless suggestion, but none the less. I think Calradia should feel a bit more alive.
(4)- How about bodyguards? How come, if I have 300 soldiers, does no one care that the commander's going into town? Unprotected? That coin-purse just jingles away looking expensive and no one feels like guarding it.
These suggestions are probably going to be torn apart within seconds. Whatever, though. Pick away, fellow forum-mates. That'd just help me improve these suggestions.

On a side note, I'm pretty excited for this.