NeverarGreat said:
http://screenshotcomparison.com/comparison/3690
While most of the corrections are an improvement, this one looks substantially worse. Instead of "mystical swamp", it's "mud puddle with oppressive blue haze".
Does making the Hoth scenes less blue somehow make Dagobah less green and more blue?
That's because the Original Release was blue in the first place. How people seem to envision the look of Dagobah intending it to be green was a misinterpretation in the first place. Even Ady has explained this.