My initial thought at the time with season 2's blu-ray restoration was that they screwed up the color tones as the red shirts looked purplish-red. Using GIMP, adjusting the hue 20 to the right seemed to have fixed that but in turn made skintones a little too buttermilk in tone. When reducing that number, there was no real midpoint that kept all hues as one would expect from other seasons.
Either which way, compared to the supersaturated hues of the original (SD, videotape) look, they're by far superior. And assuming they did use cooler temperature lamps (5000k vs 2700k) for lighting, that's explain the cooler palette too. It really is amazing how the overall use of color can affect one's mood; the warmer tones became almost irritating with their faux sense of coziness. "Captain, the Borg are attacking." "Not now Number Two, I'm feeling warm and cozy with the lighting and the joint I just rolled and maybe the Borg will mellow out too once they assimilate it."
Wallpaper music in TNG stunk. Modern youtube videos that feel a need to inject it, often with little or no mixing control since the wallpaper is apparently more important than the narrator doing the actual talking, end up being no better... back to TNG, while it could be argued Ron Jones made the show too exciting and they wanted to done it down, they went too far in the opposite direction. The few times post-1991 Trek had a score that really fit the scene, not be overblown, etc, were few. The same composers did work across all the seasons and all had come up with spectacular tracks, of which "Tin Man" is underrated IMHO, but season 3 was such a long time ago...