Quick hint that flux is already dimming...
It could be great if a flux icon changes its shape in case, evening (monitor dimming) started. Till end of my work, I need to switch it off, but I do not know, if I already have to. thank You. Or other handy notification of indication.
That is essentially what they automate, yeah. The problem being that doing that messes up your nice accurate colour representation, and there's no advantage to doing it during the day.
Another thing that's important to note is how warmer light affects things like dark vision. You should find a warmer display much easier to view in the dark, and also find that it does less damage to your ability to see in very low light. At night, in the dark, my phone will turn off all but the red subpixels, which does almost no damage to dark vision.