And another thing...

... how is programm[ing] the entire Ordinary and much of the Proper in Latin [and Greek] chant, and us[ing] Latin for some of the presidential texts" producing "a sudden lurch, [that] would [inarguably] feel like someone is pushing an agenda" (which happens to be the Church's agenda for the Roman rite, but never mind....,) the only alternative to dual liturgies one entirely in Gregorian chant, and one entirely in English and chant-free?

It's a false choice.