The entire Traditional movement is based on "excommunicated" clerics who do things "without approval" from new-rome.
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You use the term "new-rome" in your first sentence. That's the difference. Traditional priests are excommunicated by a false church.
But Feeney was excommunicated by Pius XII, whom no one claims was a false pope, not even Feeney himself.
So this argument is apples and oranges.
Your error is in not admitting that modernists rats who showed their true colors at V2 in 1962 didn't exist prior to 1962.
They most certainly did. And they most certainly were PREPARING for V2 LONG BEFORE it happened, by "shutting up" clerics like Feeney, ABL and Mueller, who the Modernists knew wouldn't go along with V2.
None of this either addresses or refutes what I said. Catholics cannot write anything on theology without the approval of the Church; this is right in canon law. This law exists to guarantee the accuracy of the teaching. Feeney did not have this approval when he wrote on baptism. Therefore the Church has offered no guarantee to the correctness of his teaching; on the contrary, that teaching was given in contravention of Church law.