"Good Morning" is marvelous. It's simple, minimalist, and wields extraordinary power with very little effort. It's extremely rare, I feel, to find something that embodies a sexual aspect of a fetish in a playful manner, and to do so without "busy" content is especially difficult.
I don't think it would be too much to suggest that "Good Morning" be considered one of the landmark illustrations in the TMF canon, alongside BAC's "Madame Keechi's Foot Salon". Of course, if it deserves to be re-done with more effort and expert touch, go ahead, but I feel that any variation on the detailing of the image or characters would still retain the same power as the original.
It makes me think of a Rockwell if he had a kink and anime flavor. In pencil of course.