Everyone: It's Xcel not Excel. Just my pet peeve.
Anyway, Level 5 is a hard level, harder than 6, and scoring is tough. But if a gymnast can do level 5 and score high 8's, she will be great at Level 6 where skills are based on the gymnast's strengths and scoring is better. Xcel is not a path to JO, and the Xcel committee makes that very clear. It was intended to be a track for gymnasts who for various reasons could not or would not compete in the JO program. Now, some gyms use it in place of compulsory then score their girls out of 4 and 5, and some gyms only have Xcel. The scoring is more lenient and the requirements are less vigorous, and you will see that Xcel gymnasts often have pretty high scores.
If your daughter can compete level 5 competently, I would have her on that track. I don't mean she has to score 9.5s on everything. High 8s are often the high scores in Level 5. Its is a good level for solidifying the basics of form and core skills. The judging is just very hard because there are so many places deductions can be taken.
I'm not against Xcel, I rather enjoy watching the routines. I just think that the JO compulsory program is better training for optionals.