CoaddInfo tables in coadds provide information about the exposures included in the coadd. It will be difficult for the new SkyWcs code to read the Wcs from those tables for old coadds, and I propose to not do it. We can still determine the input exposures and get the Wcs directly from them.
Just to make it clear: we will be able to read Wcs from old Exposures. This only affects the ability to read the Wcs component of the CoaddInfo table for coadds.