Somewhere it has been agreed that the mentor program didn't succeed because there wasn't a clear instruction guide for the mentors to make the students follow a step-by-step advancement, from total noobs (or the step where they are when they start as students) to decent deckbuilders in arena, AIs and restricted metagames.
If someone takes the job to make a good and open step-by-step guide that mentors can follow to guide the students, we can start to speak about the mentor program in a serious way. Before that, we have nothing.
I am interested in resurrecting this project, but I won't have time probably until next Friday. Thanks Submachine for making this thread.