I sifted through the first page and last five, not sure if this has been mentioned or not.

Looking back at the OP... I see two main points:

1) In any mildly challenging duty mentors will often quit straight away.
2) A not insignificant number will actually deliberately sabotage events.


Making mentor status harder to achieve doesn't fix either of these issues.
I assume this behavior occurs because the offenders are trying to speed through to the glamour/mount achievement as fast as possible, and not because they necessarily want to help novices learn older content... or even enjoy it.

Now, concern 2 can already be addressed in game. You can, and should, report ppl for intentionally wiping a group and/or being toxic. But you need to create an evidence trail in the chat log. Ask them politely to stop or change the offending behavior a few times so a GM can see that that an attempt at communication was made and subsequently ignored by the offending player.

For the OP's first concern... perhaps the severity of abandoning a duty needs to be increased for Mentor Roulette. Right now it's a 30 minute penalty for abandoning in the first 10 minutes. I'd like to consider a 3 hour penalty for abandoning in the first 45 minutes. These rules would be exclusive to Mentors doing Mentor roulette, but the if a Mentor is penalized then the penalty applies to all forms of duties (other roulettes, dungeons, trials, etc.).

Essentially make the punishment incredibly detrimental for the toxic ppl that are trying to rush the achievement. Is it even worth it for them to queue at that point? Forty-five minutes is a long time to wait for abandon, and afk'ing that long to force a kick is reportable. So risk getting banned or just not queue? I'd rather keep the bad personalities out completely.