Its was far more disturbing when asics first came online, i regret that pow change didnt happen in start. I know a lot of people have they money
in asics and for that reason dont want algo change, but as it is, whole bitcoin community is in the hands of few asic producers, which is one of the worst scenarios possible.
If we could restart, how would you change it to prevent centralization? Centralization is largely due to low cost power, ASIC's and access to ASIC's aside.
asic are indeed the culprit, and always lead the centralization, because when you have something that hash so fast and can be produced by the same company who hold the big farm, you now that this is not decentralized anymore
cpu coin are also bad, and worse than asic, because a random dude could use aws instances to own a large amount of hash in no time and centralized the mining activity
the only good solution is always and only be the gpu mining, and to prevent asic indefinitely you can just change regularely the algo, maybe the code need to be done in a way to not force an hard fork everytime you want to change the algo to prevent asic mining