The main purpose of this thread is to create a healthy discussion of the problem by using better definitions. So I don't have an opinion about what would be a sound solution, but what I do know is that current agenda of Bitcoin Foundation and involved core devs will give us centralized mining.
When you say 'agenda', do you mean that, you believe that the Bitcoin Foundation and involved core devs are
deliberately not trying to give us decentralised mining? If so, do you have any simple proof of that, that I would understand?
As far as I can tell there is no significant resources allocated from Bitcoin Foundation group to make mining more decentralized and they say that mining pools are ok as long as they don't misbehave, is that what you mean by "deliberately not trying to give us decentralised mining" ?