You should allow building of Special buildings in strat.
IE...Blacksmith for increased crafting chances. Watch Tower for large increase in sight range. etc.
Also, you should make torches able to burn down wooden walls and special buildings. Also make special buildings stay on the map once built. This now makes for some AWESOME strategic planning.
Lets say you have a fief that is really awesome, but the enemy just happened to catch you with your pants down. You don't have alot of money, so, by equiping your army with torches,you could effectively play a policy of scorched earth by burning down your own walls and special buildings making the ENEMY either have to pay and repair them or get a weakened village for your counter attack.
And then on the reverse side. Lets say you can't capture the village, but you can raid so you raid it and set some torches and you burn down portions of the walls/special buildings thereby reducing the enemies combat capabilities and money to repair the damage. By burning the walls down, you make a hole on the wall you can use without problems.
In counter to torches, you should make hammers have repair functions so you can put/repair damage from torches. Buff torches into the relm of awesome on strat with this!
Also, only allow wood walls for villages. Stone walls for backwater villages? Eh? Only castles and cities should get those.