Lately there's been a resurgence of critcizing #54, so this should be quite easy to do!
Let's make a comprehensive list of all the stuff that we think should've been addressed by the end of Animorphs. What loose ends bug you, even to this day?
I'll start with the first five.
1. What happened to Nora? (Thanks for reminding me Zakryn)
2. What happened to Eva and Peter?
3. What happened to Loren?
4. Did the Chapmans survive?
5. What became of the resistance on the Hork-Bajir homeworld?