References

MCP and Preconfirmations

MCP is fundamentally incompatible with execution preconfirmations, or any other proposer commitments that require a monopoly over ordering.
But it is still compatible with inclusion preconfirmations. In fact, they might even improve the UX of inclusion preconfirmations due to introducing more actors that can influence the contents of the final block and thus credibly provide inclusion guarantees.
I n a multi-proposer system, inclusion commitments would require less proposer opt-in (1/N) than a leader-based system