Could you modify the tool to pick the color from the painting please? I have a hard time using the option of picking the color with 'parking' the stylus on my color of choice. it works, but the time needed to read the color is so short that I often pick the color unintentionally during painting. A bit annoying when it happens over and over. Maybe the time to read the color could be increased and user adjustable?
Another option, probably even better, would be to have a (semi permanent) small button at a corner, so that I tap it with the stylus, and then I'm in the color picker mode. After that, it immediately goes back to the previous painting mode. This is different than the existing color picker mode in the brush menu, because the latter requires multiple operations to go back to the previous brush.
You may think it's a minor issue, but I pick a color very frequently, and would be great to have it doable quickly.