Thank you all for voting for this. I can see a very clear concensous that makes me very happy to hear.
This feature was already in the back of my head for the Atlas update, not as a real time drawing tool (unless we find a way to do that) but as certainly a better inteface for dealing with polygon creation and further editing.
A version of this feature is now incorporated into our spec for the Atlas release later in the year.
Of course I cannot make any promises but we will give it more than a good shot :) Nothing pleases me more than making you happy - you know it!
As someone who already had a hard time getting a single polygon to look relatively decently: Yes please.
Would be crazy helpful
Yes, this is the main reason I only occasionally use the polygon / line tool.
Oh very much yes! I want to be able to mark territories on my map and the polygon edges are very fiddly. Especially since when editing all OTHER Polygons are no longer visible AND you have little reference on the position /pixel distances, making it a very painful task
This would be a great improvement for polygons, and for line markers as well! If I could see the shape while editing, I would probably use this marker type more.
This would have been very useful when I was defining wards on my City map.