I have this very cool app called Art Rage. In that app, you can trace an image, and in that process your pencil, pen or brushes can actually be set to sample the color from the image you're tracing. I would love to see that function in upcoming versions of Affinity Designer. So, whether you're using the Pen, Pencil or Vector Brush tool (or even the shape tools), once this function is enabled it can pick up the color from the layer(s) beneath, so that you didn't have to constantly had to set the color in the color panel. The color simply is set automatically and one just have to draw and the color that was sampled at the beginning of the line (or shape) is what the tool draws directly. It would save a ton of tedious work changing colors in the color panel when tracing something on a layer or layers beneath the tool layer.
It would be really neat if there was a sub-function of that where you directly could pick up average colors for the drawing tool you're working with at the moment, just like with the color picker tool, only you are saved all the work with applying the samples correctly to the current drawing tool.
What do you think? Is this doable?