There simply is no demand for it. When adult baptism began to dwindle in the empire, nude baptisms of adults were replaced with the candidates wearing a tunic. This also meant that the anointing with chrism was now limited to just the face and hands possibly legs, the role of a deaconess became obselete.The empire also became more coed, thus the role of the deaconess in minister ing to women was no longer required.
Today there is no demand or need for deaconesses. In Greece where these 3-4 deaconesses we're 'ordained' in the past century were basically nuns given a few additional responsibilities.
If there was some growth of the church in places like Saudi Arabia or Iran where laws prohibit interaction between males and females who are non related, then the order of deaconess would be revived.