Another smaller issue I encountered has to do with PASSABLE entities.
In my game I have some models in a level with the PASSABLE flag set. The script associated with those entities will use ent_morph to change the models as needed, then reset the PASSABLE flag, so they can be interacted with. In A7 this worked fine. However, in A8, the entity remained PASSABLE even after the script reset the flag. So I think if an entity's PASSABLE flag is set in WED, then the script cannot override it. This was easy to fix, but I thought it should be noted.