Wacky idea?
Is there a group of high profile coaches coast to coast that are willing to come together and create a non-sanctioned USAG national competition/championships of sorts? Allow these girls to compete - but make a stand against the USAG? I am sure that P&G or other big sponsors that have pulled from USAG would consider backing a non USAG meet to emphasize the statement.
I know this is such a time sensitive sport for the elite girls in terms of puberty, Olympics, injury, etc. But like someone already mentioned these elite/elite hopeful gymnasts, coaches and clubs are the ones who have the most pull - I don't want to say "sacrifice the 2020 girls for the greater good"... however if any major changes happen with the organization as is, it will have an effect on these girls unfortunately.
Although unrelated to an abuse scandal, something similar to what I mentioned above happened in the Cheerleading world a few years back. It is possible - but it would take some head strong coaches and athletes. Everyone would need to stand together. Actions (and money) speak way louder then words.