I hope some miners learn to have backup plans for when their pool goes down so the network can laugh at such an attack.
A coordinated attack against the major mining pools will leave most miners clueless.
Every pooled miner should be capable of solo mining at the proverbial flip of a switch. Unfortunately, I don't see that happening. Many don't really care about the health of the network, they care about a quick, easy buck. (Not realizing the quick easy buck might go away if the network is vulnerable to attacks.)
Surely anyone with much power is smart enough to switch to individual mining automatically, no?