First school that popped into my head was UCLA. Pretty sure UCLA has lots of room (though they actually are pretty set with bigs/post players). They took a transfer from Oklahoma recently who only has 1 year left (Nicole Kornet, a guard/wing who can shoot). And a few years ago they took in Alyssia Brewer (originally from Oklahoma) who left Tennessee and only had 1 season left.
UCLA was among her final 7 schools. I believe she's a good student, and UCLA has a good reputation for academics. It could be a really refreshing change. Totally different atmosphere. And although, like I said, UCLA has good players at her position already (sophomores Monique Billings and LaJahnna Drummer, freshman Ashley Hearn hasn't played much but highly touted out of HS, then they bring in KLS's former HS teammate Aly Rossenblum 6'4"), she might actually like that there would be less pressure on her, as I believe that might have had to do with why she left.
I could also see Oklahoma being a destination. Coach Coale seems very well-liked by her players, and they could use her more than UCLA probably.
However, if she wants to stay close to home, then it's possible new schools get in the mix that weren't on her list before. DePaul and Northwestern were each in the top 25 at certain points this season. Michigan, too, might be intriguing.
Ultimately, I doubt she "transfers up" (though there's not much higher up than Notre Dame), but rather "transfers down" to a school not expected to make the Final Four every year.
Wish her the best!