If you’re using a group, you can do this already! Just go to your group’s settings page and enable the “Simplify debts” option under “Advanced settings”. (The setting isn’t enabled by default, because we found that it confused many people who weren’t expecting it.)

If you’re trying to do this across multiple groups, or for non-group expenses, then unfortunately we don’t currently have plans to support this. We tried something similar in the past, but found that it caused a lot of confusion when the shuffled expenses couldn’t be traced back to a single group. Apologies for any trouble!