The fact of the matter is that the Church as spoken on this. There is a certain degree of legitimacy of those men who have been ordained by Old Catholic bishops, since most of them (unless intercepted by a female ‘bishop’ at some point) have a valid ordination.
The Orthodox are successors to the apostles in the ancient tradition - as we are, and it is unfortunate that our schism prolongs. Anglicans split off from the Church in a much different fashion, for different reasons, and fell under the influence of Calvin and Zwingli, if not Wycliffe and Tyndale as well. Henry was very much a Catholic after the schism, but as the years passed and Cranmer spread his poison through the Eucharistic theology of the Church of England, a lot fell away. As Father said above, when the CofE changed their ordination rite it explicitly removed any Catholicity to the rite and such all ordinations are invalid.
While Anglicans are very Catholic, they can also be found to be very Calvinist, very Pentecostal, or very liberal. The Oxford movement pushed the Anglican Communion towards the Catholic end of the spectrum, bringing prominence to the Anglo-Catholic tradition and even an Anglo-Papalist structure that included individuals who wished to restore the entire Communion to Papal union from within the Anglican church outwards.
Yet it is unfortunate that ordination remains invalid in the CofE, since many of their priests are very sincere and pious people. But the Church has spoken, and Pope Leo was a very wise man. Let it be known unto God what graces the lay faithful have received through Anglican sacraments, but let us be sincere in our prayers for the members of our sister-communities of the Anglican Communion; that they may restore again their unity with Rome as it was before the Henry complication.