Thanks for the support.
CoW Swap TWAP is indeed an option within the execution framework and may be used where it makes sense. It works well in conditions with sufficient solver participation. The overriding objective is exactly as you frame it: maximise LDO acquired per stETH spent, within the slippage limits.
While this proposal is a one-off initiative, an automated, programmatic long-term mechanism is under R&D at the moment. The design assumptions behind it was explained in the latest tokenholder call and updates will be published in the the NEST proposal thread when available. This proposal is not a substitute for the longer-term framework NEST is designed to provide.