Yes but that doesn't really do much to decentralise block template construction assuming bitmain run the standard core mempool settings. I guess if you hashed for ocean and used one of their options that at least goes some way towards it, but ideally just run a node and datum so you are a miner once again and ocean are just splitting rewards to reduce variance.

Bitmain don't run standard Core. Using Ocean's standard options is a good compromise. You can literally see the block you are hashing against.

OCEAN - Block Template