I just got somewhere I could access the video and ITA with all of this. There are DEFINITELY technique issues that need fixing. This would never have gotten to the tuck with CP's tumbling coach. She spent a year ironing out the issues you listed here before even starting tuck drills. If she is still tumbling like, or anything close I would be really concerned about the risk of long term injury. I would add that her approach to the roundoff is off as well. She isn't reach out and stretching out the roundoff like she should. The bent arms in the handspring means she cannot be blocking effectively off the floor. The set for the tuck is probably most concerning to me. It is really easy to end up hitting your head when its whipped back like that rather than setting properly. CP. Is fighting that right now and hasn't been allowed to take her tuck off the tumble track because of it.