Let’s be clear here, democrats aren’t exactly chanting “hang Mike Pence” yet. Harris does need better people around her but she really never had any good people around her to begin with so I don’t know if it is a lack of available talent or she doesn’t get along well with people who may be smarter or more savvy than her.
Anyway, Harris getting her office in better order, or at least throwing out the staff she has now, is a good thing. If she is smart she will bring in people smarter than her and actually listen to their counsel.