Doesn't sound unreasonable, and this is another one of those problems that an addon could easily solve being that this would be a very niche case.

I'd also like to be able to save custom UI layouts on a class-by-class basis. For instance as a healer I might want my party and raid frames close to the center of my screen, whereas as a dps I don't need that and they can be off to the side and not getting in my way. Additionally as a dps, I like to use extra hotbars to track cooldowns and procs close to the middle of my screen, which is less necessary in other roles.