I would not be adverse to the exclusive return of the EF Mass with some vernacular allowed for the changing parts of the Mass and I am not hateful of the revised three-year lectionary as some are. I don't hate, either, the one year cycle for Sundays of the EF Mass, but its daily cycle is miserable, absolutely miserable compared to the OF.
And I am not adverse to mandating that the Mass and other Sacraments be celebrated uniformly around the world as it was in pre-Vatican II times--to hell with inculturation in the Official Prayers of the Church: Sacraments and Liturgy of the Hours.
Inculturation with popular devotions is wonderful and the vernacular for these is great. It would be wonderful in multi-cultural parishes and you don't need a priest or deacon to lead a popular devotion--you can have at it as long as Catholic sensibilities are not offended. For example in the Philippines, on Good Friday, laity actually get nailed to crosses--that should always be forbidden, that kind of inculturation, even in devotions.