This is not nice, to say the least. To change proof of work function, will piss off current miner cohort sure, as well put a stain on bitcoin reputation of stable and trustworthy and predictable What's the guarantee that history won't repeat itself and new miner wave won't centralized around new/old bitmain again. Solution should place incentives correctly, imo, it should be easier/more profitable to not be a member of a pool, or be a member of not a large one. It's easy to say though, I don't know how to do it.