Quality writing!
My opinion:
One content chain CANNOT be decentralized. Instead, it will always be a stake-based hierarchy.
The solution is to have many content chains.
Delegated Proof Of Stake, Supernode Proof of Stake, and Bonded Proof of Stake all have this inherent property because stake makes for decision-making power.
I do not think that the hierarchy is the plague.
The plague is saying that these systems are perfectly decentralized on their own when they're not.
They become decentralized by linking to one another and providing users options among different communities.
Also, look at Blurt: we have clearly centralized decisionmaking power around the shart and the regent. This is evident in many ways and we make no attempt to deny it.
However, the infrastructure is fully decentralized, and it would indeed be extremely difficult to stop blurt now that it is in motion.
We have a saying:
The drapes (claims) must match the curtains (reality).