Argument for the situation she's chosen:
She will gain little from continuing to race in DII. I doubt Ship has the money to send her around to race consistently with quality competition in DI competition on a regular basis. She's staying to get her degree. She will (likely) be making money. She already has a place to train and live inexpensively. She will be allowed to choose her own races against quality professional competition which will only further her chances of going to london or making an upcoming WC squad.
Argument against the situation she's chosen:
She may not win every race. :,(