The Orthodox Church remains alive and well without the "one bishop" concept, and much less prone to innovations and changes. We do, of course, recognize not only that the Bishop of Rome has a very special place in The Church, however we are unable to inter-commune with him because our theologies have distinct disagreements that need to be addressed and resolved, since many of them can be a matter of linguistics and historical perspectives. Until such time, our inter-communion is not possible any more than it is possible for the Pope to allow women priests. Inter-communion means sharing the same faith, not more or less, but the same.
We also have different ideas as to the scope of the Petrine Office.
Orthodoxy can stand an infusion of catholiciity: that is the ability to appeal to people regardless of ethnicity. It has been awhile since Orthodoxy engaged in missions. The Russian Orthodox Church once reached across Siberia to Alaska and the west coast of the United States. Nowadays it seems to have lost that vitality. Of course, many Rcs have the same attitude: clutch your faith to your breast and be nice to others.