I believe Tom Bartsch handles both the SCD magazine and Catalog currently. I know some collectors who have had some successes lobbying him to update certain checklists in the book, typically in regard to some variation. I think his business contact is either
bartsch@fwmedia.com, or
tom.bartsch@fwmedia.com.
I recently wrote to him about an article in SCD about the Topps 1968 Milton Bradley game and related Toops football and baseball sets that came with it, and did get a reply.
I do agree that since Bob Lemke left the enthusiasm no longer seems to be there. I have saved the last catalog that had post 80 listings and did get the 3d edition of the pre 80 only book, but think I may be done now. It was never a valuable resource on prices in my view