I have a kid who struggles with focus. Parents have been working on it at home, kid acknowledges she struggles in this area (she is 8), we are always in some kind of trial and error process to figure out what works with her and getting her to slow down and not rush through assignments, but she's getting better. It's slow going, but it's happening. Could she be much farther ahead than she is at the moment? Absolutely! Am I going to make her life miserable or make her feel badly about herself to get there? Absolutely not. I want to help her learn skills to slow down, focus, and give her best effort every time because it's good in the gym and good elsewhere, but it is probably going to look different than what the other kids show. I have another issue that effects focus which plagued me terribly as a gymnast. I wanted to do well, but got in my own way and coaches got mad. I loved gymnastics and wanted it more than most of my teammates, but had a glitch that prevented me from doing my absolute best. Still, gymnastics was a place for me where I could at least be more successful than I was in school, and I needed it. So if I have a kid who struggles with focus, I'll work with them, provided they are not disrupting the team in some way and they actually want to be there.
I think the injury issue would be more of a red flag with your DD than the focus, does she want to be doing gymnastics? She is old enough that you can ask her, let her know you won't be upset either way. Let her know that Xcel could be an option if she wants to still do gym with less pressure and commitment. Discuss that her work ethic and behavior in the gym will have consequences- sitting out or not giving her best will result in her getting farther behind her teammates while working her hardest each time will help her get stronger and progress more quickly.
Perhaps the coaches are using this as a means to ask for your help? Input on what will help her participate to the best of her ability. It is a huge help to me as a coach to hear from parents what works well for their child and helps her to focus. Maybe you and your daughter can work together to create a list of ways the coach can help her, as well as things she can do to help her better focus. Having a team behind her working for the same goal will only help her in the long run.