This is a suggestion for a product I would buy: a customization pack with material for creating homemade stories. This would include:
-Generic clue exploration cards (their text would be just 1A, 1B, 1C, 2A...)
-Generic lock, obstacle and exploration cards (with numbers and/or letters to differentiate them), and maybe mythos, and/or trauma cards with the same characteristics
-Generic event cards, with different time and order values
-Generic objective cards (labeled just A, B and C)
-A guide to customizing, including tips about difficulty of the objectives, the length of the story, the events (both content of the cards and time values). It could include new items, like nonlinear adventures (the investigators have to put together the pieces of a map, or an ancient amulet, or plainly having a room with both a lock and an obstacle), part of the layout of the tiles (such as the secret passage) depending on the decissions of the keeper (and so, he puts them when the characters find the corresponding clue), descriptions of the rooms so the clues don't have to point to a generic kitchen, bedroom or bathroom, but to the room where a certain picture is, or where they saw that strange mirror (which would be an interesting narrative tool)...
-[Edit (I forgot this)]: generic tokens for elements that can be in the house, like additional ladders (connected with the other ones or not), food, strange gems, medicines, red paint... anything that the creator of the adventure thinks can be useful in the story. They can be identified like the generic exploration cards
When creating homemade stories, the text that would correspond to each card (and descriptions of the rooms) would be written in a notebook, along with the information in the keeper's and investigators' guides. A deluxe edition can provide special notebooks for both keeper and investigators
Your thoughts?