To repeat my comment from last time, this patch probably won't be suitable for many hacks but will definitely help those that need it. I should note that you can entirely disable this patch's primary function and use it only to allow re-entering destroyed switch palaces, which is not otherwise possible.
This update is a definite improvement over the previous version of the patch. My old opinion about using translevels over submaps still stands but it's nice that you fixed the conflict with Lunar Magic and allowed the user to disable re-entering destroyed castles.
During moderation, I once again added SA-1 compatibility to the patch.