As a GM for several groups, I have a few modules that I like to place in campaigns often. It would be nice if there were a way for me to pre-package all of the necessary parts into a single module for my personal use, since while I have licence to use the items, I do not have licence to distribute them. Transmogrifier is a powerful tool, but requires that each piece be dragged over separately, which is daunting for large modules. Being able to package and add my own modules to existing games in the same way "Tales from the Yawning Portal" can be would be very helpful.
