It seems like whenever someone posts that their normal shot is a fade and they want to learn to draw the ball, there is someone who will suggest they should embrace their fade as it "takes away the left side of the fairway". The reason some of us want to learn to shape the ball is to simply have a bit more control. I don't mind my fade, but it drives me insane that I have little to no choice in the matter. Also, there are days when my fade starts to become a slice. If I had more control/knowledge/ability, I could make the necessary adjustments to bring it back to a fade/straight or as noted above, curve the ball left when a shot calls for it.
I work on this almost daily and I will eventually get it. But it has proven to be more difficult than it should be.
Make sure you're working on the right things. The path is just too far to the left, first place to look would be getting the weight forward properly, Key #2.