I'm currently working on a new mod. Butterlord will use some mechanics from Blood for Land but will hopefully be vastly improved and less exploitable.
Changes:
1 The overland map will be used and you will go about taking villages and castles via the BFL RTS style of gameplay.
2 Train times. Troops take time to train rather than just instantly appearing.
3 you use villagers to gather resources instead of auto income.
4 your enemies also use villagers to gather and you can halt their progress by killing them. You can also hire spies to see how much wealth they have.
5 troop limits: every troop has a pop limit and this can be increased with upgrades outside of the RTS battles.

6 you can also spend butter for upgrades outside of battles to decrease troop costs, unlock units, and buff your economy.
7 Your enemies will be reliant on resources like you which will greatly increase the balance of the game.
8 you can upgrade things to buff your civ and enemy levels vary as well. They might start with extra resources or have cheaper units depending on who you are attacking ( village, castle, town, hideout, encampment etc..)

There are going to be a lot more features but hopefully this new balance will please the fans of Blood for Land.
There will be a new AI that reacts to its number of troops and advances holds and retreats at appropriate times.
This mod will make heavy use of muskets.