Maybe they should debate whether or not they should have bishops at all.
The Church of England began ordaining women as priests in 1994, and is now debating whether women could serve as bishops.
All Saints' Parish Church, Belfast (Church of Ireland; though I am a WCF Covenanter Presbyterian)
"May that happy period soon arrive when the unclouded glory of divine revelation will shine from pole to pole; when men every where will see eye to eye, in all things that are connected with divine glory, and with their own eternal felicity." William Stavely (Irish Covenanter), An appeal to light (1796), pp 143-4