I do not know why is everybody turning heads away from problem which exist. Only way how we can "ban" multi coin pools is fast difficulty retarget. It is already proven with SPT with dif. retarget every 2 blocks. If you do not believe look here https://bitcointalk.org/index.php?topic=259649.msg2960920#msg2960920
Agree, I'm not sure why turning heads either but can't be bothered to argue, adjustment to difficulty I'm sure would help.