Have you looked into Ricky Tims' most recent quilting activity? It's called Mad Adders, and it's Round Robin-esque, except the rules/guidelines are a lot more relaxed. Lots of encouragement to break from the typical "rounds". I put it out to my non-guild guild, but the $75 entry fee per person was too steep for them. I was thinking maybe you might be inspired by some of Ricky's ideas.
https://www.letsquilttogether.com/sh...dders-2023-24/
If you go to Ricky's FB page, he has a video where he shows a couple of his previous Mad Addered quilts.