Where would you even go looking for the production memos?
I've posted here before, but a US research library has a donated copy of the TAS Writers' Guide, which is essentially the TOS Writers' Guide, but includes brief biographies of Arex and M'Ress, mention of the new tech (I think), such as the holodeck and environmental belts, and
a hand drawn map of M'Ress's home planet, Cait, and its relation to the Lynx constellation.
There was at least one script that didn't get to production, IIRC. There is a missing production number in the 22 storyboards (as sold by Lincoln Enterprises), and those numbers appeared on the old VHS videos.
Both of David Gerrold's scripts, "More Tribbles, More Troubles" and "Bem", were originally written as one-hour scripts for TOS. Marc Daniel's script is probably based on "The Beast", a shelved TOS script synopsis. The "Shore Leave" sequel was also mooted for TOS, and probably the concept of Mudd returning.
Probably the only person qualified to write a definitive history of TAS is Andy Mangels, who co-wrote Creating the Filmation Generation and is a Star Trek novelist as well as a Filmation expert.
Andy also worked on the liner notes and bonus materials for the DVD set of TAS.
I sent him the location of the "Bible" when he was working on the DVD, but I don't think he ended up seeking it out.