That isn’t unprecedented actually. There has been more than one rite in the West before. In fact, up until the 1960s, you had the ‘old’ Roman rite, the Dominican rite, the Carmelite rite, the Ambrosian rite, the Cistercian rite, among others. They’re still around, but were greatly diminished, along with the “extraordinary” form.
Thanks, I didn't know that - although are you speaking of a Carmelite "rite" or "missal"? The pope states that the two missals did not mean there were two Latin rites. At least that is what the motu proprio says.
In the end, I don't think the problem is having several rites/missals, but the abuses that have crept in because bishops were not holding wayward priests accountable for their deviant changing of the Liturgy on their own authority. Less vague rulings would help here.
The NO Mass, when originally conceived and celebrated with due holiness, is quite capable of teaching the faithful through the Liturgy. People can witness this on EWTN.
Regards