I am hardly an expert on ecumenism, but it does appear to me the Catholic Church does persist in pursuing reunion with the Orthodox. It appears to me there is an extremely strong Orthodox self-identification with the “collectivity”, and I don’t know that Orthodox can really be approached in any way other than institutionally. At the same time, the Orthodox self-identification with particular Councils and the seeming impossibility of there being future councils, presents an enormous barrier to reunification, either institutionally or on an individual basis.
Reunion with Protestants is altogether different, in that Protestant emphasis on the primacy of individual conscience almost precludes reunion on an institutional basis, because there is little sense of any institution being able to determine anything for the faithful anyway.
It seems ironic then, that while institutional reunion with either Orthodoxy or Protestant churchs is essentially blocked, the very Protestant emphasis on individual conscience ensures a very low barrier to individual conversion of Protestants to Catholicism. The “collectivity”, in a sense, denies that there is a “collectivity” having authority to determine anything for the individual.
It is my observation that, over the last few decades, Catholic efforts at “reaching out” to Protestants has resulted in significant individual conversions, at least in my part of the country. And, it has been my observation that barriers between the Catholic Church and Protestants as individuals have massively eroded over the last few decades. A tremendous upsurge in conversions locally tells me the Catholic Church’s outreach efforts are successful, but on an individual basis.