[Taqwus]

Also, no reanimation for the besieged -- although they can still summon troops. The besiegers can no longer assassinate commanders as it's technically their province and you can't assassinate in friendly territory, and can alter tax policy or pillage the province to their hearts' content.

Isn't supply reduced less quickly -- something like 1/(1+n) of base after n turns of siege?

Can't recall who gets usage of the magic sites. I suspect it'd be the besieged, as IIRC the besieger doesn't get full information on what the known sites are until he takes the castle.