Here's what I had to say about it the last time we had this conversation (about a month ago):
Thread: Please remove Castrum Meridianum and The Praetorium from Mentor Roulette
Quote Originally Posted by Rongway View Post
You don't need mentors to help with duties that are steamroll-watchcutscene-steamroll-watchcutscene.
You don't need bodies to fill duties for which there is an entire roulette that is just those two duties and grants an obscene amount of XP.

Mentors are no more effective in DR:MainScenario than any other person who's ever completed it, are not needed to fill the party slots, and don't get any rewards worth mentioning for being trapped in a 45 minute cutscene dungeon.
Quote Originally Posted by Rongway View Post
I would be running DR:Mentor twenty times a day if it wasn't a Praetorium magnet. I'm not needed in Praetorium. Praetorium runs do not go any faster or smoother for new players with me sitting there watching cutscenes. My DPS and mechanical recall do make real dungeons and trials go faster and smoother. How many other mentors could be helping out in content where they can be helpful, but are avoiding DR:Mentor because Praetorium is a waste of their time and skills? "So don't run it" is about the worst stance you could take it when we could just take Castrum Meridianum and Praetorium out of the roulette, put mentors in duties where they actually matter, and increase DR:Mentor participation.