Can we add “follows the Delegate Code of Conduct” as a requirement? The delegates can indicate that they agree with the code of conduct in their delegate profile on Uniswap Agora. Most delegates probably already agree with the CoC; if not, they can suggest revisions that should be incorporated in the CoC. This would allow to stop compensating delegates that break the CoC, for instance, blatantly vote in their own interest.
Another idea would be to ask some additional duties from the delegates who want to receive the full compensation. (More of a longer term suggestion, probably too late to incorporate it in the first iteration.) For instance, we could require delegates to participate in at least one committee, which is then tasked with creating research reports and/or new governance proposals. In addition to the super valuable work done by DAC, there could be a committee for Uniswap v4 related research from governance perspective; for UniswapX; protocol integration; liquidity mining programs; etc. In this way, the whole DAO could benefit from this work, and delegates who want to get involved could get paid for it. (But not more than once, e.g. joining two committees instead of one brings no additional compensation, to ensure decentralization and diverse perspectives.)