I’m skeptical of decentralized mining pools for a few reasons.
First, they greatly increase the complexity of the system between the individual small miner and the mining process.
Second, I’d be concerned about the networks for the “decentralized mining pools” not having any points of control or disruption, even if they are part of a network that collaborates to participate in mining.
I would bet that in practice there are quite a few hiccups and centralization points that in practice lead to consolidation and centralization of mining power.