I've said it before but I can't remember if it was in a thread or was its own thread.
I believe it would be a lot less work and much simpler to have 4 castle types that fit the strat regions and to just uses those for all the sieges. This should result in removing all the bugs in the maps much faster and being able to fine tune the maps much more. Instead of having to tweak all the castles to be playable.
We could either use 4 currently existing good castles or create 4 new one.
Cheers
Frank