I'm not at all optimistic about this. I understand Guido's motives and sympathise with him, but I'm afraid this will have a very detrimental effect on Python and how its development is managed.
He says: "... I don't ever want to have to fight so hard for a PEP and find that so many people despise my decisions." I can only imagine what might happen without a single decision-maker -- just think of all the vitriol that was thrown about the migration to Python 3. At best there will be endless discussions, often being decided in favour of whoever was the loudest and most aggressive on the mailing list; at worst, we might end up with multiple competing forks of Python specification and implementations...
I'm hoping that the PSF will be able to elect a single "product owner"; I don't expect them to have the same amount of influence and respect Guido had, but it would be a good start.
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