Ubisoft was the worst about this last gen.
Turtles in Time: Reshelled
Based on the slightly-worse arcade version, it had very little of the charm of the original game, including its iconic soundtrack. Attempts to expand the combat system were flat, and the game just didn't FEEL very good to play. Everything about it was cheap, squishy and weak. The only upside is the new voice acting, which mixes actors from the stellar 2003 4KIDS cartoon (for the turtles) with what sounds to me like classic actors from the original 80's cartoon (for the villains). Everything else, though... this isn't the Turtles in Time you remember or want.
Earthworm Jim HD
If there was ever a game that would benefit from an HD remaster, it would be Earthworm Jim. Unfortunately, Ubisoft once again had NO idea how to handle the game. They redrew all the animations with 4 times the frames of animation, making it look TOO smooth for cel-animated cartoon art. But then again, they also ditched the cel-animated cartoon art and tried to give Jim a weird painterly style. It looks completely bizarre, made even more bizarre given the fact that the attention given to Jim's artwork was not spread equally across the rest of the game. A lot of characters retain their super-low 16-bit frame counts, and that's not even touching... well, everything else. EWJHD contains
some of the content from Earthworm Jim: Special Edition on the Sega CD, but is missing most of it. Ubisoft remasters the soundtrack, but ignores the fact that the soundtrack was already remastered for CD in 1993. Their versions are not as good. Ubisoft also produced new content for the remaster, but the levels are all based on dumb internet memes that were already years out of date by the time EWJHD released (you fight Keyboard Cat as a boss!). It's one big ugly mess.