Hmmm I see an issue. If mentors are going in places to go "help" people and filling up these spots, it could make it very hard to queue in progress for a duty. Possibly.

Then there's this:
Does this go into effect after someone leaves?
Will this work when someone leaves before the start of the duty(Rage quitting)?
Do mentors get loot?

People repeated this often "You need to have all 3 roles so you can be any role when you get in the duty with newbies"

So what we're changing roles in duty now?