Why does that have to be on the shoulders of the USASF? They can and should have their stance, "that all concussions should be taken seriously, etc" - but other than that, once again it is on the responsibility of the coach. The usasf could provide ways for coaches to get informed and certified, but the USASF is not at your practices, they aren't at your doctor appointments, etc. Adding more to the USASF will result in higher fees for membership and for competitions, and I know that isn't what a lot of people would prefer.
USASF wishes to be the governing body of the sport of cheerleading and that means this is 100% something they need to make some clear guidelines and stances. An easy example where they made a rule that people said no one could control "image rules" (which by the way I 100% back) and have seen a massive positive change at venues in how these children mainly look. They made clear and decisive rules. At first there was push back, and then not many people following them but now there is a big difference from what I saw in years past. All that just for appearance and it made an impact. Im not saying the set penalties for concussions but so far they have not done nearly enough. They have an obligation as the governing body to make some clear and definite guidelines about concussions and make them public on their web page and educate not just their gyms, but athletes and parents. If they can make such a difference on image just think how many kids they could help protect by having a clear statement and guidelines of what gyms should be doing in this area. I'm not saying they police it but they need to be much more vocal and proactive in this area as other similar sports have.