An idea for a book or DVD that I would be interested in would be something that covers how to get the most from your forms practice. Alternative footwork, creation of partner and individual drills. A how to book of sorts.
For example this LBQ variation incorporating the bagua https://www.youtube.com/watch?v=JizJRMvC2Jc
I would love information explaining how to do that type of adaption among other things. The theory, reasoning and some practical examples