Completely agree @CryptoFlight.
If I were to design this, and I would be interested in leading that charge. We would add 10-20% extra on top of the projected gas costs (which are volatile and impossible to accurately project, so we should have a margin on top anyway), and use this extra ETH to make scheduled auctions to buy OP and either burn or send to the DAO. I would have the DAO vote on the configuration, using a dashboard and param parties to inform the community about their choice.
I helped lead an effort like this before with Commons Stack and General Magic, for designing the Token Engineering Commons’ economy, here is the dashboard we built: Config 2 | Commons Dashboard
The dashboard for this would be a much simpler, as there would be fewer parameters and a straight forward concept for the DAO to debate.