Lesser distance between civic centres To be able to make settlements more closer to each other (change limit from 200m to 150m).
New health system Lower health points for units to make combat more realistic and more power for ranked units (quick kill against civilians and low ranked units).
Wider zoom out It would be very usefull in some occassions, especially in moutain areas but also for general map view.
More civilian buildings and miscellaneous objects Like roads, flags, statues, religiuos objects (like crosses, totems, kumirs) etc. gardens, punishment posts, prisons, shacks etc. Just for fun. Civic center could be just single building and other objects arround should be addable separately by player will.