Messages that tell me of villages prosperity. These are mildly nice to know if I own the village.
Mamlukes. They are low level meaning Sarranid lords carry a lot of them, they are overpowered cavalry and foot troops, and they have too high riding skill. If they're going to be so blatantly overpowered there needs to be some mediocre counter, such as a weak horse and low riding skill so you can catch them and take out their horse. They're Sarranids, would it have been so wrong to give the desert horses instead of war beasts!?
Enemy lords loot your equipment if defeated. This wouldn't be so bad if they couldn't take books. A finite item you have no way of tracking who has it (and what if you go to peace with them before defeating the lord with your book?) should not be a lootable item for the enemy. In fact, don't let them loot my **** at all! I mean, when I take them prisoner I can't take their stuff, fair is fair.
Follow the spy mission. Rebalance it please.
Disguising into castles/towns. The odds are phenomenally low and don't seem to be based off any stat or skill. This would be acceptable if I could at least get an acceptable weapon and if 5 well armed foot soldiers didn't spawn literally 3 feet away from me horde locking me in until I die.
Tax Inefficiency! I understand why it was introduced (sort of... I mean if you can muster the man power to keep all those territories then you should be allowed to reap the rewards), but it's too potent at too low a fief count. If they insist on it, just reduce the the potency of it at lower fief counts, and add some way of combating it. Trade skill maybe? idk.
Statistic battles (aka auto calc). These are so mind blowingly broken it's ridiculous. Yes I know Tactics helps, but even then it's a joke. A huge step forward in combating this is not allowing multiple lord's tactics skills stack in the same battle, or have a diminishing effect for each lord that contributed their tactics. If fighting 5 lords, you can easily be out numbered by 20 and thats with a good bit of tactics. The skill needs reworked anyways, you actually gain NOTHING on odd levels! How was that not an automatic red flag during programming?