Ned,
You certainly tend to be more informed than I am, and have been in this game a lot longer, so I may be pissing in the wind here...
When I go to the S&Q settings in the camera, it has a "High Frame Rate" menu item, and the options listed are "Off" and "Full Scan", which I understand to mean "read the full sensor, no crop", but what's the point in saying "Off"/"Full Scan" instead of "Off"/"On" if there is no intention to offer a crop scan down the road? Looking through the menus it certainly feels like they've been configured in preparation of options that aren't yet available.
There are several ways to interpret this. One certainly is the provision is there for center crop. But I think it is still worth the campaign to request the feature of Sony.