It was debates about the very essence of the Faith that brought together the Ecumenical Synods of the first millennium, that resulted in doctrinal definitions, such as, as to the nature of Christ. Such issues are not in dispute today, thanks, probably, to the soundness of those doctrines.
There are administrative disputes, however, that should be dealt with, i.e. the overlapping of jurisdictions outside the territories of the individual Holy Churches of God, the Calendar, and more. Since 1923, they've been planning a "Great and Holy Synod [Council]of the Orthodox Church," convened most of the pre-conciliar commissions for it in the '80's, much to the credit of Ecumenical Patriarch Dimitrios, of Thrice Blessed Memory. Haven't heard a word about it in 15 years.