In the future, I wish to see some nice overhaul on the cities, villages, and towns. Each village, Town, and Castle look completely different and brand spanking new. I wish to see a feature that every building that I built is viewable in the cities or villages, or castles. The environment changes depend on it's prosperity, so I should see some ill repairs when it is on low prosperity, and when the prosperity is high, the city/village/town look fully repaired, everything working right, and everyone looks happy.
I once play a mod that allow you to see the native villages in this game, so you be able to view the buildings in every village, but the problem is that they all look the same and no unique architecture added. There is another mod that I also played once that is pure fantasy (orcs, Druids, Undead, and others), and every elite got a special ability. Not only that, all the towns are totally different, no native looks, all is modded.
I also appreciated if you add more then 1 ladder in castle sieges.