It’s not the end of the world. Those places which took to heart Pope Benedict’s Motu Proprio should now turn to phase two of what Pope Benedict hoped would happen, that the Ancient Mass would inform the Post Vatican II Mass.
Do you want to preserve Gregorian Chant and Latin: Chant the propers from the 1974 Roman Gradual (which, by the way, has the post Vatican II gradual for the new lectionary).
Chant the parts of the Mass in Latin and if you want some vernacular as Vatican II desired, chant the changing parts in the vernacular.
With your bishop’s approval, celebrate the Mass ad orientem. My creative take on the current Introductory Rite is that it could take place at the foot of the altar through the Confietor and absolution, the priest ascends the altar for the Kyrie and the Gloria with the Collect at the Epistle Side. Of course all of this could also be done from the chair.
The Credo could be from the center of the altar or the chair to include the Universal Prayer.
The Concluding Rite could be from the altar, with the Collect at the Epistle Side and the blessing and dismissal from the center.
Of course the Liturgy of the Word would be in the vernacular but with a Latin Gradual and from the ambo. For some peculiar reason, at outdoor Masses at St. Peters, two ambos are used with the Old Testament and Epistle read from the ambo on the Epislte side and the Gospel on the Gospel side. That could happen in a normal parish church too.
All of this would follow scrupulously the General Norm of the Roman Missal and its rubrics.
Kneeling for Holy Communion would be maintained.
The choreography of the Mass would follow the EF’s sensibilities. That could easily be implemented in the Vatican Post II Mass.