Out of curiousity, does anyone know why a TS-E lens cannot be made with AF?Because you can tilt the focal plane, which means that by definition, the focal plane intersects with the image plane. Simplified, you might say you already have focus from distances nil to infinity. The focus ring really moves the focal plane from left to right and v.v. (or up and down, obviously). It is up to you how you'd like that all to work out.
AF would only have a meaningful function with the focal plane parallel with the image plane and for that, Canon has a perfectly servicable f/1.4.