All of the examples given above are administrative...matters of jurisdiction, not, strictly speaking, sacramental acts of his priestly office. Sacred Tradition is clear - the episcopate (office of bishop) confers the fullness of the priesthood...it is a share in the High Priesthood of Jesus Christ. Ontologically, there is no higher state that a man can reach on this earth than the episcopate. The Pope is not a superbishop - he does not receive a fourth degree of holy orders, for the third degree, the episcopate is it...you can't get any better than that ;).
That being said, Jesus conferred a special office of jurisdiction upon St. Peter and his successors, to ensure that the Church would have a rock of unity and orthodoxy. All of the bishops share in the governance of the Church, but the Pope of Rome, as their head, ensures their unity as a single body.
From the Catechism of the Catholic Church:
893 The bishop is "the steward of the grace of the supreme priesthood,"423 especially in the Eucharist which he offers personally or whose offering he assures through the priests, his co-workers. The Eucharist is the center of the life of the particular Church. The bishop and priests sanctify the Church by their prayer and work, by their ministry of the word and of the sacraments. They sanctify her by their example, "not as domineering over those in your charge but being examples to the flock."Thus, "together with the flock entrusted to them, they may attain to eternal life."
894 "The bishops, as vicars and legates of Christ, govern the particular Churches assigned to them by their counsels, exhortations, and example, but over and above that also by the authority and sacred power" which indeed they ought to exercise so as to edify, in the spirit of service which is that of their Master.
895 "The power which they exercise personally in the name of Christ, is proper, ordinary, and immediate, although its exercise is ultimately controlled by the supreme authority of the Church."But the bishops should not be thought of as vicars of the Pope. His ordinary and immediate authority over the whole Church does not annul, but on the contrary confirms and defends that of the bishops. Their authority must be exercised in communion with the whole Church under the guidance of the Pope.