Dude, you are totally full of it. Art 1 has 81 pages of lineart. It has lineart of almost every character with any amount of screen time, 4 pages of the SDF-1, 4 pages of Valkyrie, a page on Britai's flagship, a page on the Regult, a page on the Glaug, a age on the Nousjadel-Ger, a page on the hovercycle, a page on the Spartas, a page on the Auroran, two pages on the Bioroid, several pages of Southern Cross armor, a page on the Mospeda, two pages on Inbits, two pages on the Legioss. Not, it is not comprehensive and it does not have every mecha or every character, and it is not Macross Perfect Memory, but it was serving three different shows in a book that had a limited page count and had to also summerize every episode of the entire show in the days when the whole show was NOT available on video, as well a section on the the history of anime/manga, which was totally uncommon in the US at this time.
81 pages of lineart. Absolutely none of it is fan art.
Robotech Art 3 has 73 pages of line art, none of fan art. Again, it is not totally comprehensive.
The RPGs have like 15 volumes to give you art of everything and a lot of it is bad American intrepretations of the Japanese line art, like they were looking at it and drawing it with thick ink lines but weren't allowed to trace it. Yuck. Granted, there are some exceptions where it is just the Japanese line art (REF Field Guide is pretty much all Japanese Mospeada art), but it is absolutely not correct to say they have "barely any line art". And we have no idea how comprehensive the new Art of Shadow Chronicles book will be yet, so it's hardly fair to say a product released 20 years ago is indicative of the current Robotech projects.
Say what you will about Shadow Chronicles, but it is a far cry from Robotech The Movie: The Untold Stories or Robotech II: The Sentinels.