I generally don’t have this problem because I run most of my keys with guildies but I see a lot of people complaining about this topic.
Here’s my solution:
Key are no longer bound to any particular dungeon
To activate a Mythic+ dungeon, every member of the party needs to contribute a key
Players who bail out of a run incur an additional penalty to their key
Players who complete the run its business as usual
Players who time the run its business as usual
This way, every player in the party has made an investment. Runs that are abandoned by the players still counts as a failure and the key gets decreased BUT the incentive is now for players not to leave and to complete the run.
innocent people are going to get hit in the crossfire no matter what happen. This, at least, makes sure that everyone makes an investment in the outcome rather then just one player.
What if we want to all leave the key because it’s bricked. We all regress? What if I’m in a group, an organized group, we have a +20 key, and we brick the +20, now we have 5 +19 keys? Instead of going into a different +20?
woohoo. infinite homework keys. sounds like a blast.
Perhaps it coudl be modified by the idea that higher keys can run with lower keys but you get no benefit from sucess in lower keys if you used a higher key to activate the run.