I don't know how often you tried it, but I noticed that sometimes the AI fires like some bunch of maniacs regardless of the frame rate. In some of my runs I died on Kollers mission and other times I didn't even took a single hit. I would argue it's because either not dashed properly or just random AI behavior.

Recording I get about 20-30 fps, without recording 50-55 fps and there is no difference for me.

Glitchless seems more like a kinda faster Playthrough, I just don't see the competitive aspect of that and the need to keep track of it.

Difficulty and ghost should absolutely not be a thing. The categories would be exactly the same, because essentially you can use ghost regardless of the "category" (Ghost/No Ghost). We are in no need to create 10 categories of the same run^^