The most popular mod for The Elder Scrolls IV: Oblivion Remastered, Ultimate Engine Tweaks, actually doesn't do anything at all.
Gaming Respawn reviews The Elder Scrolls IV: Oblivion Remastered.
LLC: "You have to go into The Elder Scrolls IV: Oblivion Remastered with the right level of expectation - especially if you’re a newcomer."
CCG writes - "Overall, Oblivion Remastered is a mixed bag. While the general stability enhancements are very welcome, the new graphical style may prove divisive to fans of the original. Morally, this is obviously a game meant only for mature audiences. If you want to play Oblivion again or are getting into it for the first time, then this is a pretty decent way to do so, provided you have the hard drive space available."
Playing this is making my high school self all giddy. Especially that I can play this on a damn handheld now.
If it's an ini editing mod, yeah they don't do anything almost ever except for turn down your settings.