A few comparisons:
Opening logos
Opening shot
Tatooine sky changed (sand reverted to pre-2004)
Desert shots
All R2 rocks changed
Sandcrawler shot doesn’t change in brightness like in the old SE
Binary Sunset
Ghost Luke error removed & fly removed from the next shot
Tractor beam matte painting
Lightsabers
Jabba scene transitions redone ('97 Jabba’s tail no longer visible for a few frames)
Wow, okay so it has been pretty seriously desaturated then, a little overkill in the opposite direction in my opinion but maybe it evens out on high contrast monitors and average tv displays.