I agree that focusing on her own improvements, and not about how she's doing compared to anyone else, is important. But scores don't tell the whole story either. A better routine at meet B might get a lower score than her worse routine at meet A... it depends on the judges.
She will never have to do a mill circle again after level 4. A lot of coaches on this site argue that you shouldn't even start competing till level 5 just because then you don't have to spend time learning skills (like the mill circle) that they will never use again.
Some of the tightness/body awareness stuff just comes with age. I want to say DD was about 8 when I watched her and thought, "hey, she's looking like a gymnast out there!" Sure, some kids are born with that, but that's not the norm.
As long as she's loving it, and you are happy with her coaches, try as best you can to trust the process. How she does as a brand-new level 4 has very little to do with how well she'll do as a 5, 6, 7, etc.
We have all BTDT as far as having a hard time watching our kids struggle and looking for that magic solution, but keep in mind that she is learning from the struggle as much as from the accomplishments. When I watch a meet and DD does a beautiful vault and the the HC tells her what she needs to do to make it better, I think, "Wow, she's going to go far in life." because she is comfortable with getting constructive criticism and because she is looking for ways to improve her skills, even when they're already good.