No matter the strategy, there is no guarantee that delegates will always act in the best interest of either protocol. It is essential to have mechanisms to replace individuals regularly. In this case, scheduled redelegation every x months would achieve this.
This is a good program. The advantage is reduced complexity and governance overhead. The Create a UNI-ARB Working Group appears to be significantly more complex than the Uniswap Optimism Protocol Delegation Program because, as proposed, it requires multiple working group structures.