Yeah, part of the issue is that for several of the scenes, you may as well be doing a no item challenge, which is super-player-tier hard. In fact, since you have to use camera as sub, it's even HARDER than a no item challenge for some of the problem scenes; the wide shot is actually pretty dang important in several of them, or at least quite helpful. There's several cases where the camera just doesn't really help, and the wide shot is just better... and that's on the scenes that are already very hard to clear no-item in the first place.
It's a cool idea, but it doesn't actually make a fun challenge, unfortunately.