The more I think about this, the change in philosophy is pretty wild; if Boeheim weren't so thin-skinned, it'd be interesting to hear him talk about this change.
Imagine! Regional final, chance to go to the Final Four for the first time in nine years, your senior point guard is having an excellent season, and (in what's ultimately a 3-point win in which Kansas gets a clean look at a three on the game's last possession) you're still comfortable sitting him for a minute to play David Patrick! A guy who, as you note, no hyperbole, isn't a high D-I level player.
Flash-forward 24 years and somehow your two guards who don't really play any defense anyway can't be taken off the court for even a moment in favor of Howard Washington or Brycen Goodine (two kids who've actually contributed in wins against conference opponents).
It's weird.