Miners create the blocks, so I'm not sure what decentralizing away from miners would even mean. If you mean that smaller miners are dependent on, or even supported by, 1MB blocks, I disagree. It may even be the opposite, smaller mining operations may have access to better bandwidth and speed vs remote industrial mining farms in rural china.
Economies of scale encourage, especially since the arrival of ASICs, the relative centralization of mining. This was not a surprise and was predicted from the very beginning. IMO maxblocksize has almost nothing to do with it.
You show that you don't have the slightest clue what Peter R's definition of decentralization really means. Distributed hashrate node != decentralized entity.
A large miner only needs a hash of the transactions in order to mine remotely, so it could delegate the censorship of transactions to some other entity (e.g. IBLT), thus effectively censorship of transactions is under control of an entity that is aggregating hashrate (nodes).
Whereas, a smaller independent miner that refuses to delegate and be permanently sited so that it can't be easily regulated by TPTB, will need to have enough ephemeral bandwidth to see every transaction across the P2P network. For example, I can still obtain an unregistered, wireless connection to the internet here in my location with a prepaid 3G USB dongle, but if I site any where but a few special locations then I will often see the bandwidth drop down to 28.8K baud.
I throw 'baud' in there to remind youngsters that maybe somebody in this world still uses an analog audible spectrum telephone (or HAM radio?) modem.
What a great point.
Yet another blunder on your part.