So far my understanding is, once you are in , without excellent reason you can not skip classes, that means going colleges is the only way to maintain status. Do you think, she will be able to get another college that soon? And will the new college accept her and they have to go through immigration process again.

Better is to go to the university she got the I-20 and visa. Before she finishes the college she can apply and move to new colleges. Or skip and apply to new college and get new I -20 and new visa.