So what you are all asking for is a set of guidelines/ rules / process / regulation / best practice to manage the risk at airshows.... Which guess what? We already have, and in spades!
And they didn't work.
I am quite certain AAIB will be actively reviewing every damned word of them, and think we're likely to see some fairly robust recommendations in their report.
"Sh1t happens, can't be prevented" is just not an acceptable response to the death of 11 innocent people.
Any review by CAA post accident, but pre-AAIB report can't be regarded as anything but interim measures.
G