No that's just Nexus following bad comments without verifying anything themselves. This is the sticky there now:
"Since Patch 1 when Larian Studios added their own Mod fixer, this patch is now redundant.
Edit: There have been reports that the Larian may have rolled back so I'm reopening the comments so that people can help each other with fixes."
I uninstalled Mod Fixer myself and checked both after patch 1 launched and just now; it's still needed. If /you/ don't need it, then it's because some other mod you're using has ninja included the mod fixer or because the type of mods you're using have never needed it. Larian didn't make an error in their patch notes, it never got fixed.
If you don't have the Mod Fixer installed and you try to use the game with a mod that actually requires it then two bugs occur:
1) When you start a new game: You're loaded into the character creation map with a bunch of naked men and the dark urge. No therapy, that's actually what happens.
2*) If you load a game: You can't initiate dialogue with other characters or interact with various map elements.
*This will only occur if you change your mod list. If you use the same mod list, in the same mod order, then the game doesn't need to recompile the story and will be unaffected. Override Mods (ones that show up highlighted in BG3MM) are exempt from this.
If you'd like to verify this yourself: Remove ALL mods from your mod directory, disable Vortex shennanigans, put a single mod that requires the Mod Fixer that you know doesn't include it (for example:
Unlimited Dyeing), activate and export load order via BG3 MM, run the game, create a new game.
Please quit trying to tell people that the Mod Fixer is no longer required.