"The Cathedral Rite died when Constantinople fell. The Cathedral Rite required large multiple choirs and many deacons in order to be done properly."
Actually the Cathedral Rite was still serve in the Cathedral of Thessalonika in St. Simeon the Theologian's time. Doctor Alexander Lingas in his article: 'Festal Cathedral Vespers in Late Byzantium', Orientalia Christiana Periodica 63 (1997): 421-455, debunked the theory that the Cathedral Rite was difficult to execute. See also: http://www.analogion.com/CathedralRite.html
"Our modern practice is based totally on the Monastic Rite. Even the antiphons on "Through the prayers..." and "O Son of God..." are monastic rite for Festal Liturgies that has become the regular usage is Greek influenced parishes."
Again the Antiphons were taken directly from the Cathedral Rite where they were used both at Vespers and Liturgy and were called the Little Antiphons precisely because they only used 4 verses of 3 Psalms.
The format was:
Pslam 114 4 verses with response: Through the prayers of the Theotokos…
Psalm 115 4 verses with response: O Son of God Risen from the Dead…
Hymn of the Only Begotten Son
Prayer 116 4 verses with response: The Trisagion
The Psalm verses disappeared from the Trisagion and Pslams 114 and 115 were replaced with Pslams 65 and 66 for Sundays and 91 and 92 for Weekdays and selected Psalms for Feasts of Our Lord. The Carpatho-Rusyns still normally use Pslams 65 and 66 on Sundays. The Typical Psalms and Beatitudes are an importation from the Monastic Typika service.
Fr. Deacon Lance