An open standard makes sense for very simple scenarios (such as a cross-chain swap between USDC <> USDC), but for more complex actions may crowd out innovation, and may be counter-productive. Much of the innovation around cross-chain intents is packaging additional complexity with varying tradeoffs (gas etc.).
If relayers opt-into a singular standard for more generalized use cases, I worry that innovation from protocols like Klaster, who bundles a series of txns together, will suffer. Specificically defining, and likely reducing the scope would be a helpful activity