No one but her coach and, hopefully the gymnast, knows why he wants her to repeat. It could be age, maturity, form, lacking a skill, it could be that the gym has alot of great girls at that level and they don't have the room at the next level. Do you like this gym? Is it a good fit for your dd? Does it have a good track record for training other gymnasts? How many optionals do they have? I understand you are frustrated so, talk to the coach. Say you are concerned with Suzie repeating because you wonder if she will be challenged. Say what should Suzie's goals be in order to move to the next level? If you don't get a good answer take he to another gym and ask for a free trial and team eval. They may tell you where they would put her on their team. Don't however sit in the lobby freaking out , watching every practice, and bad mouth the gym and coach. Here's to good communication. Good Luck.