The user manual is rather vague about the purpose of the Color Innovation feature, saying that it improves color reproduction and simplifies the configuring of monitors with an extended color gamut. I have indeed met this option on such monitors only. Perhaps it regulates the color gamut?
No. The Mild and Brilliant modes do not differ from each other and from the Custom mode when it comes to color gamut. So, it’s unclear to me how these modes are related to the extended color gamut.
The gamma curves rise up in the Brilliant mode: the picture becomes brighter, but the monitor “swallows” some light halftones, which merge into white.
Things are better in the Mild mode, but the rise of the curves and the distortion of lights (the top right of the diagram) can be observed even here.