The scan of this book is excellent. The missing star is because a good deal of the book is filled with character sheets. To be fair, most of this material is probably stuff that didn't make the page count of the first book, and Palladium probably had no idea how much of a hit the Robotech RPG would be, their most popular until Rifts.
The heavy hit here is the expanded timeline. My late 80s group used it as a kind of "plot point" campaign. The aircraft carrier stats and floorplans are nice, as are the writeups for main characters not included in the first book, like Claudia Grant, Roy Folker and Capt. Gloval. Descriptions of the "Reconstruction Blues" Earth are expanded, including the indroduction of Palladium's version of the Eastern Block, EBSIS. Although the core book and this one encourage playing in the post Zendradi armada destruction period through to the begining of the Southern Cross, with the material in this book and the Zentradi sourcebook, groups can easily play the three year SDF-1 in space period.
The book also contains missle logs and hit locations for mecha. I can't really speak to these because that's a little too close to war gaming for me.
The most disappointing aspect of the book is the discussion of military rank, which could have been clearer. It doesn't explain why some characters had naval rank and others had air force rank.