1. This was dumb. While other books make weak shout outs to the events of TAC, this was a bad continuation of HBC. Based off that, it's a great surprise to see any Arn put in such an effort, and if it worked-first I doubt that the Hork-Bajir could get much done without a seer (may just be handing the Yeerks more hosts actually). Best event it would only entail a small victory on a remote outpost with little reaching effects. Symbolic victory, but little real or morale consequences.
2. This was...you know right after ghost Elfangor, I have to wonder if they weren't contemplating changing Animorphs into a fantasy series midway. Conceptually, it's painfully Yeerk-ish.
3. Aldrea was much more childish and petty. Maybe it's the whole knowing you're dead thing, but her behavior was repugnant: looking down on the humans that had accomplished a lot. obsessing on Toby (you have a grandson you know). Not all that surprising, but her arrogance, her single mindedness, it seemed to have advanced in disgusting ways since her transformation. End ploy-stupid. I can't imagine Toby would be all that fussed, really they were barely seen to discuss anything together.
4. Alright, it had a low place in this book, but Cassie does tend to have new morphs most of her books, so it was hard to fit it. I've yet to see a wolf in real life, but it's a creature I deeply enjoy, and have a lot of respect for. The endurance thing-full tilt all day is a lie. 6-10 mph all day maybe, respectable, but that's not a wolf all out. Like any large dog, I see it being very formidable, if lacking the power of a tiger or gorilla, but like the tiger, I see this being a very enjoyable form: a capable body, sharp senses, a mind that's likely inquisitive and readily focused.
5. I will again give Cassie kudos for some excellent morphing. If she hadn't been narrator, I'd be very surprised Aldrea picked her (someone to talk her out? I believe Rachel could have done that, if in a different way.) I personally think she should have be less accommodating to this thing using her body, and laid out a protocol at the start. Yeah, love notes in math? You are covering up an alien take over and your secret identity, but you hand in your doodles? That cost her a couple of those kudos.
6. Maybe. Not Aldrea. Not a fan in HBC, and after this I loathe her. Couldn't be someone I idolize: wouldn't let them know all my shame, or someone I disdain-wouldn't give them the satisfaction. Have to have some knowledge on who they are, but, no lasting personal histories I guess. I don't think pushing out Aldrea is akin to killing. She's conscious, she's not alive. For all we know she has a dead consciousness out there in the Void too. Either way, I'd absolutely demand my body back eventually. Even if I like whoever it was, in the end its my body, mine alone, and so it shall remain.