First, an offtopic: I just submitted a feature request to P2PU, that it would be nice, if you can compare versions, like in Wikipedia:
Then, into the business: If I noticed correctly, no one has given feedback on your plan. I think the problem is, that our topics are so different that we run out of working memory: I can not recall who is studying what, and because everyone does not have background knowledge on each other's study subjects, we can not hold interest.
For example: If there were 10 of us studying the basics of electrical engineering, everyone could comment on each other. Now when I look each other's plans, I see that they are nice, but I can not invent what to comment because I know nothing about the subject.