Here's my take based on 13 years of competitive gymnastics, 18 years of gymnastics coaching and judging, cheering at the HS, college and UCA staff levels..I've also been coaching and judging cheer for 15 years. I'm certified by USAG, USASF and NFHS/AACCA.
I agree 100% with limiting the tumbling in cheerleading skills, for the time being. I believe that there are too many uneducated coaches out there "teaching" skills like fulls, doubles and whips. I believe that pulling back some skills and placing a focus on perfection before progression will create a safer environment for our athletes. In addition, there needs to be a detailed tumbling coaching certification, which includes a hands on component. When getting my USAG certification I learned all sorts of important things, like that 3 year olds shouldn't be jumping off of anything higher than 18", because it's bad for their developing knees. THOSE types of things would be important for cheer coaches to know as well. Physiology is important. The USASF certification process needs to be more detailed.
Notice that I said limiting the tumbling for the time being. Now, if they put the perfection before progression in place, and a more comprehensive certification course, in a few years they can start adding skills back in-as the athletes and coaches will be better prepared to learn/teach those skills.
Cheerleading needs to stop giving credit for layout that are not in a fully laid out position (180 degrees). If you are bent at the hips it's a pike, plain and simple. If you only rotate 3/4 of the way around, it doesn't count as a full. If you look like a frog during your BHS, it's not a BHS (especially if you look like a frog splatting on your head).
This needs to be an over haul on 3 fronts:
1. Limiting skills until athletes have achieved a level of mastery on the previous skills in the progression (for every single skill).
2. Coaching education: a program that includes a "textbook" and a hands on portion...spotting techniques are taught, drills for skill progression taught...also some type of mandatory "continuing education hours" required every 2 years to keep your certification valid (proof of course taken through USASF or USAG, or spotting technique class taken at a coaches inference etc).
3. Judging: Not giving credit for skills that are not executed with 100% proficiency.