We are working on something somewhat similar in application level. We decided to first tackle the lending platforms liquidation MEV. Where liquidators compete on a well defined premium, which give rise to gas wars and millions of $ that goes to miners.
Our approach is to make the liquidators auction in the beginning of the month for the right to liquidate. And then to divide the liquidations fairly among the liquidators over the month.
We are implementing a practical approach that will go live on September atop makerdao. The idea is that liquidators will share their profits with the users, who in return give them priority in the liquidations.
A defi-lego trick makes it possible to achieve it without any change in makerdao protocol.
More details are available here: https://medium.com/b-protocol/b-protocol-b6dd4e3bf9c0