Exposing the miners - and then what? They are already exposed anyway, at least some of them, remember the 4Mb block. And if successful, and degens are forced to submit their nonsense directly to miners (skipping the mempool), this could make mempool unreliable for fee estimates. I am all for stopping the ordinals and runes nonsense, but this cure could be worse than disease.
Fee estimates based on the mempool are absolete. It's time we move to another approach. https://github.com/LN-Zap/bitcoin-blended-fee-estimator
It still uses mempool data, just combines it with historical data. Another related concern is that some cartel of mining pools will create and have access to private "mempool" with better paying transactions than in the public mempool. So this cartel has an advantage, will grow bigger (more miners switch to them), so more centralization. But OCEAN still exists, I may be wrong.