<p>We also understand that Canon is redesigning the shift mechanism on the new tilt-shift lenses and that they won’t share the same design... I would gladly welcome a more reliable design to the shift unit, and hopefully Canon can make the new lenses a bit less prone to broken knobs and other issues that I have seen.</p>
Problem with the shift mechanism on the TSE-17? News to me.
If they're redesigning ONLY the shift mechanism, perhaps they're looking at the post-style shift like the PC-Super-Angulon and older shift lenses. The new Schneider PC-TS lenses use barrel rings to adjust both tilt and shift independently. Very cool, indeed.
I will say the post-style shift is really a joy to use. I have the 75mm shift lens for the Mamiya RZ, and I previously owned the TS-E 24L II. Both are extraordinary. I do find the TS-E knobs a bit tedious now that I've experienced a post mechanism. Big fan, though the Mamiya post lacks a way to lock things down.