I took a nightie making class several years ago. The instructor had us all check her measurement chart and send in our size. She not only made up kits, but she cut them out. She said the class was a sewing, not cutting class. I was a bit concerned, but then thought, well it is a nightie, if I do not like the colour or print I am only wearing it to bed. Turned out I loved the print.
For quilting, I would be happy with a kit if it is a technique class and the project could be made into something instead of becoming orphan blocks. So I guess I am saying include a pattern or two to use the finished blocks.
If I took a workshop on all the various 'Disappearing Blocks' it would be great to have kits for each block made up.