An archdiocese is presided over by an archbishop whose see may have or have had importance due to size or historical significance. The archbishop may have metropolitan authority over any other suffragan bishops and their dioceses within his ecclesiastical province.archdioceses. in the Catholic Church, East and West there are around 640 archdioceses or equivalents many of them titular only. There are 233 cardinals at present not all of whom are archbishops in charge of Sees..Some are titular, some are emeriti  some are mere bishops and a few are priests. This means that there are more archbishops heading archdioceses who are not cardinals than those who are. 
This is not Pope Francis’s doing, it has always been so.