Francis said though it's impossible to “cancel out” faults of the past, this should not “continue to contaminate” relations with various other Christian communities.
Engagement with vexing questions is part of the life of a pilgrim church. It is strangely un-Catholic to assert that doctrine does not and cannot change.
In Week of Prayer for Christian Unity, traditionalists disagree with Pope Francis's “polyhedron ecumenism”; In the U.S. they highlight the faults of married deacons.