Hey man,
Don't let her go and don't think she's necessarily a mix. She could just be a big girl and she is likely topping off.
I swear ceiling space and perches make life more interesting for them. I'm only of limited experience here but I've never had a pushing issue, and Wallace is getting bigger but I don't expect him to be much over 9 feet.
You've got a pretty girl there with a beautiful natural pattern. I think she's probably slowing in growth.
Hold the course and try a few new options before you decide to re-home her. I'd be bummed.