It looks like POS coins might be your thing. What do you think about Bitshares?
I know practically nothing about PoS coins; unfortunately the forums I have been reading only mention them to dismiss them.
Do you think that PoS solutions are immune to miner centralization? Or will centralization only be delayed?
I see centralization-decentralization as a spectrum. With POS the cursor is a lot more toward the decentralization side of the spectrum.
For example with Bitshares there are 101 validating delegates, admittedly a single entity can set up several delegates but if it become problematic the users can fired that entity really quickly.
With NXT I think the entities which together have the power to validate the transactions are several dozens, or even more.
So basically I think POS coins have structurally a better decentralization than PoW coins by almost one order of magnitude, which is huge since there is a non-linearity of the negative effects of centralization (but I am not convinced that the greater centralization of Bitcoin is a fatal flaw).