I'm not entirely sure how that would educate lesser mappers, especially when the more complicated stuff will just get lumped onto the more experienced participants anyway. Not to mention, speaking from experience, even a collab with 1 other person is awkward as hell, especially when their skill level is well below yours. You end up spending more time fixing their mistakes than you do creating new content.
If mappers want to get better, practice makes perfect. You wont learn any other way.
If mappers want to get better, practice makes perfect. You wont learn any other way.