There isn’t much to talk about here, so forgive me for such a low effort post.
Essentially what I’m suggesting is an ingame Workshop mod manager where you can enable/disable, or, at the very least, view what mods you have installed without having to go into the actual game files.
Refer to the image below for a similar system from GTA V.
So basically something like how Gmod handles it? Sounds good, and maybe a button to reload the files (if UE4 requires files to be reloaded for mods to be active).
It would be much easier than loading your mods, and starting up the game only to find out that the mods don’t work with each other. Then you have to close out the game, unload those mods, then load the game back up again to see if what you did worked.