To be honest the losses in sieges are absurdly low. It doesn't feel like something challenging at all. Where's the fun in that?
And also: the enemy lords were near the castle, but it seems they didn't take part in the defence I just don't understand why (well, maybe becouse they knew they would be sloughtered in the siege, becouse it's so easy for the attackers to take the castle).
Next thing: resistance in pillaged village. Seriously? Peasants of a village have the courage to oppose a 500 men army? And the joy of such a battle is rather doubtfull. But if it was made up just to show us how it looks like than OK.
Not sure about the detailed info of the kingdom you are at war with. From one side it's great to have it. From the other it brings down the element of uncertainty of what to expect. Imagine an important great battle, don't you wanna have doubts of what to expect next from your oponent (was it a fatal blow or is it possible that he has a second army? Can I rush to lay a siege to a key city, or should I rather take more carefull steps? It's realistic and joyfull to have such doubts).
The field battle feels rather like a chaotic slaughter of waves of enemies with no cooperation, than an organised battle, where you can make use of tactical moves.