It didn't. Ocean and DATUM is the answer for how you decentralize mining more and move toward allowing individual miners select their own block templates. It doesn't answer the question of: when choosing your own block template (as an individual miner or pool) how do you selectively choose what data is good or bad if all txn data looks the same? In a similar vain, the same question can be asked about relaying transactions and whether ultimately it is better to have a more restrictive default txn relay network with many more private ones and unpredictable blocks.