I support the request for a quick color fill by dragging it out from the color toolbar. The bucket tool is great to have and necessary, but the option to just quickly fill an area with color without having to change tools is very convenient.
For example, I don’t use color filling often and therefore don’t keep the bucket tool in the toolbar, but I need to fill an area with color often enough that it becomes a bit annoying to open the additional tool panel, select the bucket, close the panel, fill the color, go back to the previous tool… those are too many steps when there could be a simple drag out of the color icon and done. So why not have both options?