@kelvin
The team is playing with a few new @safe modules, trying to close the major gaps
https://github.com/ethereum-optimism/optimism/blob/safer-safes/nonceless/packages/contracts-bedrock/src/safe/UnorderedExecutionModule.sol
https://github.com/ethereum-optimism/optimism/blob/timelock-hackathon/packages/contracts-bedrock/src/L1/Timelock.sol