Probably the most informative and neutral write-up I've seen. Still, the only relevant parts are the "longer throw"/perpendicular, and chromatic abberation. CA part has been an age old problem and has been addressed in recent times with the LD/ED/SLD/Apsherical what-not type of lenses. The longer throw is therefore the real remaining frontier, and my earlier guess of the lens companies addressing this by making lenses with "longer throw" is correct.
Reduced coverage is really an artifact of the cost of sensor for FF, and DX/EF-S/DC/Di whatever are not good definition of digital lenses.
Maybe in time to come when the resolution of sensors have gone to 20+ Megapixel and FF, I hazard to guess that the short comings of analog lenses would be shown. And if the author is correct, only WA are affected.