The full brief is an interesting read. It seems there may have to be a culture change in unlimited air racing, and certainly it appears there will be a lot of engineering work (evaluation, testing and certification) in the near future if some of the top unlimiteds are in the same boat that "Galloping Ghost" was. In some ways, although a tragic loss of life, being at Reno there was plenty of visual evidence to help assess the cause.
I can see the logic of the high g recommendations, but sadly, as often the case with a structural failure at these speed, in this case even a G-suit would have been futile with a near instant application of 17G.
I have to agree with the g-suit thing. 17Gs instantaneously is far more than anyone can handle when it is a surprise. Fighter pilots the world over in 5th gen and 4.5 gen fighters are all limited to ~9gs with very temporary exceptions of 10-13gs....and still that beats the snot out of a fighter pilot that spends year after year pulling G WITH a g-suit, so a civilian race pilot in a structural failure scenario has 0 chance of handling the sudden un expected onset of heavy G...like you said.
About the regulations of the racers, Im torn. On the one hand you cant argue with safety, but on the other, anyone that has read through aviation history knows how air racing today is very small and very fragile compared to the 'Golden Years' when air racing was popular. I regularly have to explain the Reno Air Races to even aviation minded people. The main stream media only talks about it when there is a crash and even the main stream sports networks do not cover it. My point, more regulations could just push air racing even closer to extinction.