Shaw is now what Seven of Nine used to be on Voyager -- a lover of structure, order, and discipline.
The Voyager-era Seven still exists within her (she had Mozart's Ave Verum Corpus playing in her quarters).
It's telling that Seven can't handle a reflection of her previous self. What do you do when things fall apart? (Like they are right now?)
It's easy to "enjoy structure" when your staff does the bulk of your job for you! (Shaw hasn't done much of anything other than get injured, whine, and yell).