I spoke with a seminarian who attended the SSPX seminary in Winona in 2000, and then came back in 2006 (a few years after +Williamson left) and stayed for a few years.
The changes, hitting him all at once, were shocking. I'm surprised he stayed that long!
But he told me some very, very interesting things about seminary life in 2006.
Fr. Le Roux came up with a shorthand for the 3 virtues he wanted every seminarian to practice most of all:
THE THREE D'S
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Delicacy - ???
Disinterestedness - "Whatever the superior wants, that's what I want". Complete passivity.
Dependence
Of all the virtues the SSPX American seminary could be pushing on its seminarians -- to the extent they even have a shorthand "Remember the 3 D's!" they can remind each other with -- those three "virtues" are some very curious selections for their FUTURE PRIESTS.
I need not list a bunch of better virtues for a priest: wisdom, prudence, piety, knowledge, fortitude, lack of human respect, charity, devotion to Mary, etc. You could easily add to this list.
Also, the super-virtue for SSPX seminarians today is OBEDIENCE. Therefore, logically, the Superior General (the highest target of obedience) is venerated as a living saint. His mouth always speaks the words of God.
They even created a sort of "holy card" commemorating certain Bishop Fellay meeting(s) in Rome, etc.