I don't think a capsule is really necissary, the roll bar theory has been tested and has been extremely successful in more than one type of boat racing, I don't knkow, I'm still undecided, I think Brad's experience could have been several times worse, the largest factor I think is where on the course it happened, had it been turns 1 or 3, I think the results would have been very different (the speeds were at their lowest at the point of the incident), if you call it anything it would have to be "fortunate" that things didn't turn out different, unless you get the boats opinion...You had a lot of fiberglass looking for the same real estate, I've driven too close behind 75+mph jetboats, you cannot see and everyone wants to get out front, if for no other reason than visibility.
As for the steering, I was surprised to see that no one used a spring to pull the steering left in case of failure, if she goes to the right, that gets hairy fast...IMO
In all motorsports period, there is always an improvement that can be made, especially when you are talking about safety, the speed cap is the best one IMO, it keeps it competitive and that much safer, I know of at least three jetboats now that can travel at well over the 150 MPH mark for sustained periods of time and would be more than capable of turning good, now that would require a capsule, air, Haans, and the biggest pair of nuts in the world....