First of all, K.A could not possibly elaborate everything about the Animorphs' families and friends in every single way that would make the book as boring as hell. I can almost imagine the lines.
Loren came back to her old life with her dog. Eva and his husband became filthy rich due to Marco's donations. Rachel's mom forever feels guilty about letting her daughter fight that war. Etc etc. Sounds too much like a fanfic instead of the real thing. That's why the book is called "Animorphs". Not "Animorphs and their families and friends". Plus it leaves us, the readers, to think about it. Not everything can be learned from just reading. We have to figure it out by ourselves. Get that brain gears to work or something.
Jake would never let Loren join the war. Tobias losing Rachel was bad enough. Putting Loren in the danger was now beyond the line.
The Pool ship was designed specifically for Visser Three's use. No way Visser Three gives the former Visser One's blueprints of it.
Rachel died, isn't she a major part of the series? Visser one the Yeerk died too, but isn't she a big part of the series? So is Voldemort. I think it was already hinted in book 6 that Tom was going to die. By Jake's own command, thus destroying Jake as well.
Actually, the point of saving her... according to Jake, was no point at all. They just risked their lives for Tobias's personal sake.
