Of all the Ambrose nonsense, I *think* the most overlooked (least criticized) element was the whole "Archbishop" thing.
I mean, you can have bishops consecrated in this state of necessity and we Trads are familiar with that. But once you go above a simple bishop, you're talking hierarchy and jurisdiction -- something NO Trad has (aside from supplied jurisdiction, of course).
So the red lights start flashing when a "Trad" bishop claims to be an archbishop, a cardinal, or a pope. This should be common sense.
I know, the SSPX had an Archbishop founder and Fr. Pfeiffer would REALLY love to re-create the SSPX. Nevertheless, it still doesn't work that way. Sorry, Fr. Pfeiffer. History only rhymes, it doesn't literally repeat.
Fr. Pfeiffer got all freaked out when Ambrose said he considered the (Boston) seminary canonically erected? What was he expecting? As soon as he heard "Archbishop" he should have known Ambrose would try to claim some kind of jurisdiction over the seminary. Because Ambrose was already claiming jurisdiction by his self-appointed title of Archbishop. An archbishop isn't just a super-strong bishop. It's something fundamentally different than any of the Trad bishops alive today.