Just leave SegWit and its junior hackers alone.
Think bigger. Segregated Witness is a joke, a trick, kinda cobbling up heterogeneous things, I admit, but just leave these guys alone with their lifetime achievement, build yours.
Lame. Someone who has contributed so little doesn't get to shit on those who have contributed so much. I defy you to find a group of users more knowledgeable, experienced and intelligent than the bitcoin-dev nerds.
I rather prefer senior programmers (20+ years of professional experience, minimum) to nerds. Nerds typically are busy proving themselves and do not care about the cause.
It was how we ended to this situation with bitcoin, being overtaken by pools and ASICs while our super genius lads were playing SegWit shit. I just don't take them that serious. Juniors are ok until they have been put in charge.
I see your POCW as a way of spreading the mining out into an ever thinner sheet over the users, but at the end of the day mining centralises. no matter how you wrap it up.
You have to get rid of the fee. That is what everyone fights over and that is what causes the centralising pressure. Then I think you could have POW mining that didn't centralise. (Of course as IOTA shows that brings up it's own set of interesting challenges)
As far as I can see, without fees, any system would be vulnerable to DoS attack. Got any reference to prove me wrong?