The upper level access is now closed. My only guess is for loss prevention, but it looks like MadisonMarquette is giving up entirely on Bayfair's upper level. It currently houses a college and dialysis outlet, but the rest is empty. A single set of escalators provides access but no elevator. The floor hasn't been updated since the 80s.
Those familiar with Bayfair may remember when the upper level was the only mall access to Montgomery Ward. However when Target demolished the building, it built a new one lower down.
Change is inevitable.