Honestly, for me I might consider letting her do 4 again, if she was allowed to work 5/6 skills along with it. Like, she has to hit 5 bar routines at 9.5 or higher and then she works clear hips. Cast to handstand can be done at 4, and that is absolutely needed in 6. Level 4 has some good foundational skills and if she really perfects them this will help her later on. Maybe talk to the coaches and see if they can work out a plan to help her perfect the level 4 basics while adding in the higher skills along the way.