Matthew,
Perhaps these foot notes from a 2010 letter to Culture Wars Magazine will help you understand why Traditio refers to the 1962 Missal as "Half Novus Ordo". The 1962 Missal published by the SSPX has been their own unauthorized (pre-1955 & 1962) hybrid version for decades and that is why it is indistinguishable to you and other SSPX faithful who grew up with it. Do a search and compare a non- SSPX Missal and yours.
I only attended SSPX from 2000 - 2015. From 1976 - 2000 I attended an independent OSJ chapel with Fr. Frank Slupski, later Bishop Slupski. He used the 1945 Missale, I think.
So when I say the 1945 and 1962 Missals are practically indistinguishable, my words should carry some weight. I have significant experience with both. The latter is CERTAINLY not "half Novus Ordo". It's completely Traditional as as matter of fact.
I've also experienced both Holy Weeks. They are both solemn, traditional, and there isn't any significant difference in their mood, attitude, dogma, what they contain/leave out, etc. There is nothing of the "Novus Ordo" flavor, Modernism, or any systematic destruction in the latter.
The Catholic Church doesn't operate like a first grade classroom. I.e., we don't believe in the concept of "cooties" -- from Annibale Bugnini or anyone else.
Rather than cooties, I only avoid something when someone like Cardinal Ottaviani shows how the Novus Ordo is systematically defective in certain areas, calculated to destroy the Faith. And then when you look at the wider, practical application of the Conciliar religion (Modernism), it's even more destruction. THAT is something to avoid.
I've never see a Cardinal Ottaviani write-up on why the 1962 Missal is defective or bad for Catholics.The only arguments I've ever seen against the 1962 Missal amounts to "Bugnini cooties". And since I'm not 6 years old, I tend to ignore such rubbish. My answer: even a broken clock is right twice a day. What if Bugnini made the Sign of the Cross during his life? Are we to throw that out as well? Hey, Bugnini was a Freemason! It must have been a step towards the Novus Ordo Mass! If a Freemason does it, we have to throw it out, right?