To be clear the decentralizing aspect is that in the legacy pool setup, you're simply lending hashpower. The pool operators are mining and provide you a payout after the fact for your efforts based on their distribution rules. With only a few major pools, that's centralized.
In the ocean model, each "miner" is in fact mining. It is one pool but the operators are not necessarily making all the mining decisions. Rewards are never centrally custodied and individual miners can select different transactions tho I presume the actual worker that mines the block ultimately builds the block.
Maybe it's not perfect but it's a step in a better direction.
