Can't we discuss ideas without having people immediately thinking that one of these ideas is going to happen? It only happens if it's a good idea. We're just discussing whether or not such a thing might be a good idea. Obviously, there would be a lot of issues to work out.
And by the way, 900 masternodes is hardly centralized.
Currently, almost all blocks are found by about 15 actors. This would have a perfectly distributed block generation among 900-3000 actors. Explain decentralization. Gotta hop off for a bit but will check back. Thanks for entertaining weird ideas.