Some may call it a blessing or a curse, but the Ordinary Form Mass is so fluid that one can do what one pleases with it within parameters of the rubrics which too, are fluid, or too fluid.
You can have some Latin or none or multiple vernaculars (the latter most despised by almost everyone).
You can sing the Mass in its entirety or only some parts. Seldom are the Old Testament lessons and the Epistle chanted and maybe on special occasions, the Gospel might be chanted.
On Christmas Eve, our newly Ordained Roman Parochial Vicar was the Celebrant and I con-celebrated. This was the Family Vigil Mass and normally the homily is geared toward young children. My PV decided to chant the longer version of the Gospel which includes the genealogy. He gave a great academic homily on Jesus’ human lineage. He also chanted from Preface Dialogue through the Per Ipsum and Great Amen the Roman Canon.
He chanted flawlessly.
Thus the entire Mass was chanted, save the OT lesson and Epistle.
In my 40 years of priesthood, I have never chanted the Roman Canon in its entirety. To add solemnity to High Holy Days, like Christmas and Easter, I might chant the Epiclesis through the consecration but not the whole prayer.
Of course, in the Tridentine Mass, the Roman Canon is never chanted and prayed in low voice if not silently. The Preface dialogue and Preface are chanted and the Per Omnia at the end of the Canon.
The Sung Mass in the EF is tightly prescribed. No winging it or adapting it. There is no fluidity whatsoever.
I found the chanting of the entire Roman Canon a bit tedious. And facing the congregation it could come across as increasing the “performance feeling” of the priest entertaining the congregation before him. Of course we have discussed how facing the congregation makes it seem like the priest is playing to the congregation and speaking or singing to them.
The performance aspect of chanting the canon could have been alleviated somewhat by an ad orientem posture of the priest but not entirely.