FWIW the current version of mev-geth is not meant to be a long term solution. It is meant to solve for the real danger that naughty miners will partner with Citadel (or others) to do the extraction themselves, and Citadel suddenly gets to decide which transactions get to be included in a block. If you start with the assumption that all available MEV will be extracted, I think mev-geth can be seen as a lesser evil.
The Flashbots org is interested in funding any research that reduces harmful MEV / negative externalities of MEV. Would love to hear more about your ideas around better ways of approaching the problem at hand: GitHub - flashbots/mev-research: Project management for MEV Research