We switched DSS who has major anxiety, from a 2/2/3 rotation to a 3/4 rotation and OP, honestly, the difference it has made is unbelievable. He is doing much better at school, much calmer, much more manageable and visibly less anxiety.
Seriously consider it. To be honest if I stayed in a hotel for a fortnight and they asked me to move rooms every two days I wouldn’t know whether I was coming or going.
Whatever you do you just have to make it easy for her, don’t cart loads of stuff back and forth, separate uniform and clothes out for you and Dad, keep it at both houses then she arrives and is ready to go, there’s no packing/unpacking to feel sad about.
We also don’t do pick up and drop offs to the home. And that helps hugely. So the kids go to school, they stay in school, other parent picks them up. That way there’s no conflict between us, and it basically lies within their routine, making it...not a big deal.
OP out of curiosity are you picking her up every day after school then sending her to Dad?