I don't know what the big deal is. It's quite simple to look at it. The foundation behind Papal infallibility is St. Peter. Such a foundation is weak since one doesn't consider Antioch in the picture.
There is also a difference in interpretation between our churches on the verse of the "rock of the Church." To RC's, it's Peter, and to Orthodox, it's faith. This requires reading of the ancient Holy Fathers.
When one sees the model of the ancient Church history, and the model of the Bible, councils were set to decide, and not a unanimous decision by St. Peter. St. Peter was there to conduct and to reach that conclusion that the whole council reached.
I accept that Peter is the Rock. But not exclusively so. In an interpretation such as we have on theosis, we can all be 'like the rock'. Peter is simply the archetype used in discussing this.
Even a Pope, Leo the Great stated that RomeÃ¢â‚¬â„¢s position was based on the Apostles Peter and Paul, and that these two Apostles were equal in power.
Ã¢â‚¬Å“I. Rome Owes Its High Position to These Apostles.
The whole world, dearly-beloved, does indeed take part in all holy anniversaries, and loyalty to the one Faith demands that whatever is
recorded as done for all men's salvation should be everywhere celebrated with common rejoicings. But, besides that reverence which to-day's festival has gained from all the world, it is to be honoured with special and peculiar exultation in our city, that there may be a predominance of
gladness on the day of their martyrdom in the place where the chief of the Apostles met their glorious end. For these are the men, through whom the light of Christ's gospel shone on thee, O Rome, and through whom thou, who wast the teacher of error, was made the disciple of Truth. These are thy holy Fathers and true shepherds, who gave thee claims to be numbered among the heavenly kingdoms, and built thee under much better and happier auspices than they, by whose zeal the first foundations of thy walls were laid: and of whom the one that gave thee thy name defiled thee with his brother's blood. These are they who promoted thee to such glory, that being made a holy nation, a chosen people, a priestly and royal state, and the head of the world through the blessed Peter's holy See thou didst attain a wider sway. by the worship of God than by earthly government. For although thou weft increased by many victories, and didst extend thy rule on land and sea, yet what thy toils in war subdued is less than what the peace of Christ has conquered.VII. No Distinction Must Be Drawn Between the Merits of the Two.
And over this band, dearly-beloved, whom God has set forth for our example in patience and for our confirmation in the Faith, there must be rejoicing everywhere in the commemoration of all the saints, but of these two Fathers' excellence we must rightly make our boast in louder joy, for God's Grace has raised them to so high a place among the members of the Church, that He has set them like the twin light of the eyes in the body, whose Head is Christ. About their merits and virtues, which pass all power of speech, we must not make distinctions, because they were equal in their election, alike in their toils, undivided in their death. But as we have proved for Ourselves, and our forefathers maintained, we believe, and are sure that, amid all the toils of this life, we must always be assisted in obtaining God's Mercy by the prayers of special interceders, that we may be raised by the Apostles' merits in proportion as we are weighed down by our own sins. Through our Lord Jesus Christ, &c.
Leo Ã¢â‚¬Å“Sermon LXXXIIÃ¢â‚¬Â. (On the Feast Of the Apostles Peter and Paul (June 29).) quoted athttp://www.ccel.org/fathers2/NPNF2-12/Npnf2-12-214.htm#P4043_1035305
(see Appendix for extensive quote).
Paul is the rock. And all the Apostles (to extend the analogy) are the foundation stones of the Church...
Ephesians 2: 20 built on the foundation of the apostles and prophets, with Christ Jesus himself as the chief cornerstone.