The only part of a Mass that is theologically required (as valid form) is the Consecration. It is not necessary for valid Eucharist to have the Creed, or the Lord’s Prayer, or hear any readings, homily, etc.
There is certainly theological content that was in the Triditine Mass which is not in NO. The Last Gospel is an obvious example. But it’s not Sacramentally necessary, so it makes no difference.
Since NO obviously contains the Consecration, it is Sacramentally valid. Since it is approved by the Magesterium, it is licit. I don’t understand why people quibble about this and that when the required form is clearly present.
Ask them what they think is the required form for Eucharist. Ask them if we have to recite the Creed for Eucharist to be valid.
Oh, and by the way - a lot of people don’t like the priest facing the congregation. But this is not required by NO. There is no reason why the priest could not celebrate with his back to the congregation if he wished to do so.