Ah, yes, the "liturgical music director" will now direct the congregation. Vapid,sing-song drivel more suited for a hippie commune or 1970's soft-drink commercial than any sort of Catholic religious service is the hallmark of almost all NO churches I've had the misfortune of attending in my lifetime. I am 30-something, not in my 20's, but had the opportunity to hear traditional Catholic hymns in my childhood before the predominance of OCP drivel. I pity you, Gopher. Post VATII Catholic liturgical music is some of the most God-awful dreck ever yowled and screeched by human throats. I strongly advise you to explore the traditions of your Church prior to the revolution Father Limpwrist, Bishop Aging Hipster and their heretical cronies try to deny ever happened.
Well unfortunately, that was the time I was born into. I know the Liturgy has gotten much more liberal and very inclusive lately, but I never took the time to think about the music.
As you point out, the Music director controlls the tempo of everything now. It starts with total control of the opening prayer in song, and doesn't end until after the Priest leaves during the closing song.