Traditionalists feel they are just that because the more intellectually honest ones (not the total radicals) recognize that Catholic tradition and Tradition are living things. Most people should know that the Mass of 1962 is not exactly the same as the Mass of 1570. There were slight alterations. But they are basically the same rite. It’s one missal that underwent slight revisions. As far as I know, that Pian missal of 1570 was basically a codification and universalization of the Gregorian missal from ca. 600. That skews your percentages a little, but that’s not the point I’m going for.
The Mass developed through time. Fidelity to tradition does not mean fidelity to the Church exactly as she was in 150 a.d. That would mean that we would have to reject all the ecumenical councils and the significant chunks of doctrine and dogma that go with them. Traditionalism is a fidelity to the organic growth of tradition, which was transgressed in the creation of the new missal, which Cardinal Ratzinger described as a “fabrication.” No one wants a “banal” liturgy, but that’s what he said we got out of the deal. Traditionalism as I see it does not reflect a “one size fits all, this is the way we did it in the year X, so it must be the only way” mentality. Many manifest that thinking, but I think some criticial self-reflection would show how unsustainable that is since the Tridentine missal does reflect refinement in the Church’s thinking and changes in previous praxis (kneeling, for instance, only has a roughly 1000 year history).
Just as we believe in the development of doctrine as our understanding of principles and ability to artculate them becomes more refined, so also we have held that our liturgy is subject to refinement as we come to understand the sacred action more deeply. We figure out what we’re trying to convey and then try to find the tools to do that with. To reinforce that we actually worship the Eucharist Christ we found the most extreme posture of veneration we could - kneeling - and replaced what was, while a posture showing honor, something not quite as forceful -standing. I think this means, of course, that a development to what we have in the Pauline Mass would not be a priori out of the question; change is, after all, possible.
My beef, then, with the Novus Ordo (I know that’s considered a polemical term by some, but NO is such a handy abbreviation) is not that it is different but that I think those differences do not reflect a deep reflection on the tradition and an organic growth out of it. Some of these problems I think are inherent in the rite, others simply in its celebration. For instance, the lack of even the concept of reverence which is displayed in many NO celebrations is not inherent to the rite. I understand that. It can be done very reverently. It’s the means of creating the rite that, in my mind, makes it untraditional.
Because of the lack of organic growth in the NO, I consider the missal of 1962 more traditional, even though it is not more antique. Since we know Vatican II warned against antiquarianism, I don’t think that’s a problem.