Shortcut for adding roles with task

I really like the feature for tagging tasks with specific Role.  Right now for doing that I had to create task and then open the task to assign the role to it.

It would be really great if we have a short method for doing the same. Some of the ideas :-

- A drop down button beside the task (in the week plan view) that shows up the available roles.  Similar to the circle icon used to mark the task as complete.

- Drag the roles from left pane and drop it on the task that changes the color and associates the role with task.

give a thought on this.