Remove or hide everything in the Effects KCM that's not optional eye candy stuff
Right now this KCM is awkward because it contains a mix of fun optional non-critical animations, important accessibility effects, KWin-internal debugging effects, and so on.
For everything that's not purely visual and optional, let's either move it elsewhere or hide it from the KCM. Then we can move the KCM into the Appearance section of System Settings where it makes much more sense.
We've been slowly moving in this direction already, but I thought I'd open this Issue to formally track process and offer a place for any needed discussions.