What is your main objection to the model that Synereo is using?  Is it based on the thought that asymmetric connections will lead to ISPs blocking connections for Synereo data nodes or your thought that all PoS systems will centralize?  While I agree that all PoS blockchains will centralize to an extent around the holders of the PoS tokens, I don't think that is necessarily a detriment to the system.  I've stated before that as long as the currency holders have direct proportional input to the security of the chain based on their holdings that I think centralization around these parties is acceptable.  Your opinion is that this is unacceptable centralization and my opinion is that it is the currency holder's right as long as participants aren't forced to join the system.