With the support for extensions, I was hoping to create a WYSIWYG menu builder for the RPG Kit (well, it wouldn't necessarily be limited to that Kit, of course). Before extensions, I was limited to Design Mode and Custom Blocks in terms of user friendliness, so a WYSIWYG editor would be a big step up.
So the WYSIWYG editor sounds great and all, but I'm not sure how to save the data so that it can be read during the games runtime. In the previous incarnation of the menu builder, every menu and menu component had its own behavior. With this method, there was a great number of behaviors needed for every scene, so I ended up adding all the behaviors to the scene at runtime -- something I consider hackish, and I'd rather not resort to that again.
The bottom line is, I'd like as seamless an integration as possible. Open extension, edit menus, (close extension?), test game. Is such integration even possible at this point?