Looks like the combat will be quite interesting.
One thing I'm not sure on is the sieges, they're (paraphrasing) 'similar but based on morale loss'. Does that mean it will actually be possible for the attackers to loose a siege without external intervention?
Yes. A siege is quite similar in concept to a combat. The defenders in a siege is divided into two parts:
- the levy, which can be raised
- the garrison, which always stays with the settlement
Someone asked about assaulting in a siege(by a button press). This will probably not be permitted(but don't quote me on this once the game is released
Likewise, a defender leader might try and attack the army laying siege if his levy is big enough(but yet again, if he is a coward, he might not). Thus if the defending force attacks the sieging force and wins, the attackers need to flee themselves