I don't think her score is going to improve under Orser, that's pretty much impossible anyway with her current scores. But she said she wanted to continue with FS, and this move showed she means serious business & is being smart about this.
Going to TCC will not boost her scores, yes, but if she stays with Eteri they would certainly drop. Because her GOE & PCS are pretty much at the mercy of RusFed & Eteri, and Eteri might like her, but RusFed might not much longer. By going to TCC and actually doing something to earn GOE & PCS, she is taking matters into her own hands & not giving the international judges any chance to doom her. In the best case scenario anyway.
Actually the only concern is Rus Nats. Because if the 3rd Russian lady choice this year shows me something, RusFed can do as they well damn please.