Your post got me thinking about what remasters I actually liked. Here's what I came up with:
Despite Warcraft III Reforged being a legendary dumpster fire, the Starcraft remaster was basically perfect. They took the original 3d models that were used to make the game's sprites and just remade the sprites at a higher resolution, implemented widescreen and higher resulting support, some other QOL, and made absolutely no gameplay changes. In fact a non-remastered client can still crossplay with remastered players because it's exactly the same engine. Also, I think it was only $20, a reasonable price in my opinion.
>Age of Empires II: Definitive Edition
This one makes more departures from the original than SCR but I still think the end result is a superior product over the original. Better visuals, more content, Steam integration (cloud saves, etc), and QOL. According to the developers, this is using the same engine as a base, so it counts as a remaster.
>Master Chief Collection PC
I've heard that MCC's launch on the xbone was horrible and it took them years to fix everything, but by the time it got to Steam that's basically been resolved. MCC now is great, and I had a fun time playing through the series on legendary with friends. Purists have pointed out a few lighting and audio issues, but from what I've seen the MCC team has been addressing most of those as they come up. Overall, I'd say it's a very good remaster.
A full remake in UE4. Looks nice, but is buggier than the original and they didn't quite get the movement right. Hard to describe but it just feels subtly less responsive.
>Wind Waker HD
Way too much bloom, but otherwise it's an inoffensive update. Not worth the price. Just emulate the original with Dolphin. I think there's even HD texture packs if you want.