The only sound way to deal with the Laserdisc as a source is to do complete lossless video transfers and go from there. The issue then becomes the size of the files. At that point we'd probably need a HD dedicated for the storage so whomever would do the editing and conversion could do it straight from that HD.
Of course, there would HAVE to be a back up of the files....just in case.
Weren't the original capture files for the HD broadcast fairly large too?