Wouldn't it be sufficient to replace the PoW sheme with something far more complicated than SHA-256 to kick all the big ASIC-farms out? Just replacing SHA2 with something that can't be put onto an ASIC for years to come would be an easy solution to distribute mining again as the mining could be done by those running full nodes again. Mining wouldn't be a business anymore but more a compensation for running a full-node all the time.
If then some ASICs should show up in the future the PoW could be changed again. This also rather helps to secure the network in the long run as I just don't see how huge ASIC-Farms in third world countries providing more then 50% of hashing-power help secure BTC.
The goal is not to replace miners, that would be a violation of the social contract the protocol offered to miners.
Miners have invested large sums of money into protecting Bitcoin and screwing them is just not logical.
Also, as long as the current ASIC mining farms are protecting the chain, they are a great advantage as they greatly increase the barrier to attack the chain. The goal of the proposal is to leave revenue with them but diffuse political power by sharing it with stake holders. Or in other words, to increase diversity in miners so that 2-3 parties cannot hold the currency hostage.