Guys, what you describe is just how the HSL color model is supposed to work. HSL has 3 axis, hue, saturation and luminance. Pure colors in HSL are 100 % saturation and 50 % luminance. If you increase luminance to 100 % you get white, if you set it to 0 % you get black. Neutral grey by the way would be 50 % luminance and 0 % saturation. This is contrary to the HSV/ HSB model where pure colors are defined at 100 % luminance and you need to decrease saturation in order to brighten up colors. So how would they be able to change this behavior without switching to a completely different color model?
And concerning the green color of foliage, grass etc: These colors are usually a mixture of yellow and red with just some minor portions of green and maybe some cyan/ aquamarine depending on the whitebalance and lighting conditions. If you want to tweak the color of foliage and grass you mainly need to address the yellow and red sliders. This is nothing out of the ordinary and has been the same with all software I’ve used so far.