Megadeth's 2004 'Youthanasia' reissue is like this. They quite literally just went in and slid everything up to max. Fucking unlistenable.
I also love when the remaster consists of swapping the panning and nothing else. "Now the lead guitar is 22% to the left instead of 22% to the right, that'll be £15 please".
For an opposite example, the remaster of The Satellite Years by Hopefall took what was a muddy and genuinely terribly-mixed album and finally cleaned it up, letting that masterpiece of an album finally shine through!