Yeah, I'm getting a bit disappointed with Steem CPU mining also.

"How about we add another Miner-witness queue that takes turns?
How about only allowing one ip address to mine with only one miner?"

I think these are good ideas to keep the POW queue more descentralized.

I posted my complain about this unfair issue a few days ago:
https://steemit.com/tag/@cryptohead/steem-mining-queue-dominated-by-the-rabbit-servers

Unfortunately nobody has provided a solution yet.