Sounds likes She's doing fine to me.
Although I agree she needs to eat more.
Try to intice her by Giving her more of the Stuff she does like, and maybe here and there while giving her what you know she likes throw in something new.
Granted it probably won't work, Cause animals are alot smarter then what Some people give them credit for, But it's worth a shot.
Have you tried feeding her some Cat or Dog Kibble, besides Crickets for the added Protein?
I used to have a Gerbil, and he ate anything, Chew Proof Dishes, his Wheel, Shelves etc, etc.
I named it after My favorite Character off of Stargate SG1,
"Apophis" I believe thats how you spell it, He was the first Gould System Lord introduced in the Series not the Movie.
Just keep trying I'm sure she'll tell you her Complete, Menu likes Soon enough, As for now though Sounds simple enough to remember though...