Not at the moment certainly, but maybe in the future in the hypothetical scenario we are discuss here where some miners might want to include high fee paying transactions which other miners want to exclude. Especially once fees start being worth more than subsidy.

And still, if not via Stratum then it is still a good concept which we could see developed and rolled out in other software. Improving decentralization by allowing every individual miner to craft candidate blocks if they want, rather than just settling for centralized control via the pool operator, can only be a good thing.