Hey Henning, you mention the “quaddraw” tool in maya as something you wished blender had. I have watched the beginner retopoing tutorial on your youtube channel where you show of some things the tool can do. I am not sure how well you know blender yet, but blender can do things that are pretty similar to most of it. It just isnt gatehered in a spesific mode or tool like “quaddraw! I dont have time to look it all up and make a video, but i recorded something i think you should know if you do not already know it.
You can press control+rightclick in edit mode and blender will create an extrusion towards the location of your mouse pointer. Check the video out for demonstration.