+Dan Martins aptly summarizes one of the main difficulties facing Catholic Anglicans:

Under what circumstances is it appropriate to sever formal institutional ecclesial communion? This is a question I have lived with and struggled with for years turned into decades. It should come as no surprise to anyone who knows me that I come at this question from a fundamentally Catholic perspective, which is to say that I understand the Church as an essentially visible organism. Institutional disunity is real disunity. My friends of a more Protestant bent (Anglican and otherwise) are able to be less anxious about schism, pointing to an underlying spiritual unity among believers that smooths out those rough places where we are still at odds with one another at a visible level. Catholics enjoy that luxury to a rather more limited extent.