Hmm, admittedly no Sand People in the adversaries chapter is an oversight, but Jawas probably don't need a stat block.No Sandpeople, no Jawas, no X-wings, no jedi, and almost nothing on the Rebels or Empire. There isn't even a listing for the Empire in the index. The second game sounds like it will be about the Rebels which is what Episode 4 is also about so it shouldn't be of any surprise that this books doesn't cover that.
I would argue that there's a LOT about the Empire in the book; a major theme is avoiding any Imperial entanglements.
Only Luke got to fly in an X-Wing, and that was only at the very end, when the saga was transitioning to the main characters' active participation in the Rebellion (well, aside from R2 and Leia, who'd been doing so the whole time). More appropriate to cover that in Force and Destiny.
While there are no Jedi, there aren't really any in ANH either. Obi-Wan fits the Force Sensitive Exile much better, and Luke is at the stage where he's bought the specialization, but none of the powers or talents.
What the book DOES have is Obligation, dianogas, Corellian digger crawlers, YT-1300s, droids as PCs, etc. Yes the book goes into a lot of detail beyond the ANH, but it's supposed to. Because most groups won't just re-enact the movies...