Good question, I'm guessing: nothing. I think it will take the US government taking major legal action before anything will even begin to change. I see the deaths continuing to pile up until there is major legal action either against the IFBB and maybe promoters/coaches. And I don't think the changes they make in response to this will improve anything either, things like conditioning and diuretic use are just the tip of the iceberg. Bodybuilding is going to continue to grow, the technology/methodology for body modification is going to continue to grow, and the lack of value for human life is going to remain low or go even lower. The only thing that could bring real change would be the legalization of enhancement combined with medical supervision, limitations, and testing protocols. I would say that is a LONG way off.
The fact that hardcore BB is the opposite of mainstream, no matter how much it has grown with all the classes, it is such a small blip on anyone's radar at the federal level that I just don't think they care about a handful of deaths. Ask any random person on the street and I doubt they even know we had a bad year death-wise.
It will take one of two things, IMO, for the feds to really take an interest:
1. Someone dying on stage at a big show like the Arnold or the O.
2. Some politician or someone very connected's kid gets a coach and it goes super wrong. Regardless of what people think the courts will ABSOLUTELY consider what most coaches are doing to be practicing medicine without a license. It does NOT matter that doctors could not legally do what coaches currently do, it's still illegal to do period. If you write in an email a drug stack, despite some flimsy "for informational purposes only" disclaimer a prosecutor will chew right through that if some senator's kid is lying on a slab in the coroner's office. Even without a drug cycle in most states writing a diet for someone is illegal without a dietetics degree AND license. The fact that it is so common and no one gets in trouble does NOT mean it's actually legal.
Please don't misunderstand me I personally think two adults entering into an agreement, no matter the details, is no business of anyone's outside of the two parties involved. Unfortunately, the laws are the way they are and not the way I would write them lol.
The industry benefits from the fact that NO ONE CARES. Wanting BB to be mainstream would be a negative IMO. We had more people die from opiate poisoning, 100,000+, in the last year than we lost in the entire 15 years Vietnam war..............BB deaths are not even a consideration, IMO, for the powers that be in government.