I think it’d be good to distinguish possibly two different requests here. I would upvote for either/both. 

Sort by source used to answer: i.e I want to see all Answers which linked X card or cards in X collection. OR sourced answers using threads in X slack channel, etc. 
 

Secondly, sort by question origination i.e. all questions/answers from X slack channel. 

Agreed some automation around assigning experts would also be helpful. 

It would also be nice to be able to bulk select questions and assign to an expert. Currently, we have to click into each card and assign an expert separately, which is way too many clicks for teams with lots of prompts.

I like the idea of sorting by source too.  In a perfect world, it would be great if the questions that correctly surfaced a Guru card could be visible from the card itself for verifiers. If I were verifying a card and could see the questions that were asked in relation to that card, it might help me evaluate the effectiveness of the card and/or understand what content I need to give more attention based on questions that had been asked.