Actually, this reminds me of EVERY edition except 3ed.
Go back to AD&D 2nd ed. You had your five saves, and they were based on your class level. Guess what - it didn't matter who was casting the spell on you or how powerful they were. At low levels you needed high numbers, regardless if it was Meepo's cousin or an Archmage. At high levels you needed low numbers, so you almost always made your save - again regardless if it was a 1st level caster or it was Elminster and the Council of Eight.
Saying this "flies in the face of what D&D has always been" is just rhetoric - it's been a flat number regardless of who cast it for quite a bit. This just amkes it so that 1st level folks don't get insta-killed by the first thing to cast a save-or-suck spell at them because they have a chance to save, and high level folks can't ignore everything.