To the OP, your best bet is truly to speak with the coaches and find out their plan. The mobility score to move up to L7 is 31.00. So the USAG feels that this score is enough or shows some mastery to go to the next level and many gyms follow this. In addition L6 is considered, at least in my state, as a pass through level. Many gyms opt out or score out of this level. And although your daughter is young, she is not that young to be in L7. You can be as young as 7 in L7. You will find her age group as a L6 is in the middle. My daughter did L6 (3 meets) in the fall and L7 (2 meets and then state) in the spring. While she did very well in all her meets, I think she was in somewhat of a disadvantage going into the state competition. Most, if not all her competitors were competing L7 all year, some even repeating. My concern with your daughter is no matter how I look at it, repeating L6, practicing L6 routines does not lead to a any progression that makes sense. Admittedly, I am not a coach and my daughter has been in gymnastics for only 4 years, but if she repeats L6 even for the first part of the year, continues to practice L6 routines, it shortens the time for her to master L7 or do better in L7. And if she goes to L8 the next season, having a whole year of L7 is certainly more beneficial than having a half year. Having said all that, I also believe going through the levels quickly is a path taken by those who want to go elite. A steady conservative progression is a path taken by many. Ultimately, what will benefit your daughter depends on her goals and what is comfortable for her and what will make her happy.