When you finally finish some harder content, you get all sorts of rewards: you open up collections, get mastery points, finish all sorts of achievements and such. While this game does not directly punish experts taking newbies to runs, there's also no rewards from all the extra time & effort used to teach the mechanics to newcomers and taking some retries after wipes. It is only you who just completed the achievement /cheering around, and others nodding that "great, great, gz, ...", but wouldn't it be more fun if all could get something for such achievements? So, what do you think, should the entire group be rewarded when a member in a team completes some harder content first time?
I was thinking some sort of Mentor chest - some extra loot to members when someone completes content first time - and possibly a related achievement with few tiers. The reward should be enough to justify the possibly extra hassle, but small enough to prevent people to start calculating and abusing the reward. It's main objective would be to reward players who are willing to take players new to some instance in to their group.
I haven't thought the details much, and I hope others will point out the weaknesses in such system, as well as give refinements or totally different ideas for lowering the treshold for groups to take players new to specific instance / boss with them (other than mercenary groups taking gold as payment for completions).