I didn't yet touch this in Corona so I didn't even know this is how it was implemented. Well it's kind of true to name, that's what "Tint" does, but how that is useful to anyone..
Good catch.. ! Would be great if this was working as white balance color compensation instead (as it does so in Vray for example).
Not very fond of this wheel reinventing. At the moment, Vray 3.12 does have pretty much state of art framebuffer color correction panel, I would gladly take that. If they can copy the good parts of Corona, Corona can copy the good parts of Vray.