On what do you base these assertions? (including the farther-upstream) assertion that two-nacelle rule was concocted to discredit FJ)
It's from an interview with FJ's daughter. Here's the link:
http://www.trekplace.com/fj-kdint01.html
There are several places in the interview where the tech manual is mentioned. Here's one of the relevant quotes:
"FJ kept meticulous records as to which drawings he was working on and how long they took, and NONE of the "non-canon" material in the TM was produced after the contract for the motion picture was signed. Further, GR had already seen all of FJ's extrapolative material in 1973 and 1974. FJ was very concerned about doing anything extrapolative in GR's universe, and made a point of sending "in-production" materials from the Technical Manual to GR on a regular basis, including all the speculative stuff like the new ship designs (see below). GR only responded with words of encouragement. If GR had said "no," or "stop," or "this isn't how I envisioned it," or "this conflicts with another project I'm working on," FJ would have dropped it or changed it immediately. GR never said a single negative word.
Again, in FJ's own words: "FACT: A copy of the Articles of Federation were sent to Gene Roddenberry on 22 June 1973. His reply of 28 August states: 'I thought the Articles of Federation were extremely well thought out and presented, although I have some question in my mind whether they are a bit too long to maintain fan interest.' FACT: Copies of the Fleet Ship Classifications and the Dreadnought 3-view were sent to Gene Roddenberry on 22 June 1973. At no time during the preparation of the Manual did Gene ever mention he objected to these types. In his reply of 28 August 1973, he did state: 'Your drawings jump right off the page to the reader and are very exciting.'"
Now stay with me here, 'cause this is the most Important Part of this whole interview. If you follow the FJ Timeline through 1975 and 1976, Paramount rejects script after script from GR and others, while FJ's Plans and Manual climb the bestseller lists to astronomical heights. GR's head must have been ready to explode. Then, if you read further, Paramount starts to court FJ as a consultant for the movie but FJ declines any involvement. At that point, Paramount and GR have the same problem. Because of the aborted Lincoln Enterprises deal to publish the Plans and the Tech Manual in 1973, and because Lou Mindling of Paramount allowed FJ to copyright the Manual in his own name in 1975, neither GR nor Paramount owns the rights to FJ's original work (such as the Star Fleet space station, the Dreadnought and other ship designs, the UFP "two faces and starfield" logo, etc.). [The rest of this paragraph is pure speculation, but I don't think I'm too far off the mark.] GR doesn't want to use FJ's designs because he feels he has had little control over their creation and no control over their publication, and he'll be damned if he'll pay royalties to an outsider for stuff spun off from the universe he created. Further, FJ has proven difficult to deal with in other encounters (Planet Earth) and GR doesn't want to go through that again. Paramount desperately wants FJ to be involved with the movie because FJ's work is so enormously popular, but FJ is not being a "team player" and agreeing to be a consultant or a writer on the project. If FJ is not going to be directly involved so they can exploit his name in their publicity, then Paramount doesn't want to pay him royalties, either.
After that point, everything in the movies was either designed to directly contradict FJ's work, or to modify designs or concepts first put forward by FJ to make them just different enough that FJ could not claim copyright infringement (especially the UFP logo you mention in
Q12). In retrospect, knowing what a "control freak" GR was about the series and the movies (as documented in many written accounts), none of this is a surprise to me."
Don't get me wrong: I don't hate GR or think he was some jerk. He was a businessman and felt he wasn't getting his due from a spinoff of something he created. Whether he was right or wrong about that assertion wasn't my point. My point was that he had no particular issues with FJ's ship designs until he realized FJ was making more money off of them than he was. Then after the fact he proceeded to discredit FJ's work because he made it personal. Did he really need to do that? I don't think so, but I'm not him.