I agree the troops replenish way too fast. I also think that as some sort of balance mechanism, Taleworlds ramps up the difficulty the more it goes on. Thats good in the early & mid-stages, but in the late stages I still feel that its ramped up to the point where you can't win itt as a war game. Yes, you can use diplomacy to help, but I don't want it to be purely a diplomacy game over a war game. Yes, you can just execute all opposing nobles as you capture them, but since I try to play as myself in a different world, I don't want to be a homicidal maniac. I still feel you should be able to eliminate factions...at least to the point where they only come back periodically as rebels & you eliminate them again.
When you get 3/4ths of the world conquered there's just too many factions attacking you all at once on a front you can't cover all by yourself and you can't trust the other armies in your faction to help with. (I hate that they besiege something, have it to the point they are about to attack it, then decide they need more food and drop the siege. Unless they are about to be attacked by a larger army, just have them follow through with te siege, then take care of their food problems after that. They'll have less troops to feed then anyways and if its a town they may be able to buy food at the town they just took).