1. A shameful lapse in creativity that's why. You could have had jail-breaked after or in route to being a controller, caught one of the Animorphs morphing on the roof and demanded answers. Okay that's only 2, and they aren't that creative, but I'm not a professional writer.
2. Really hate the iskroot one: be a wallflower or die? Lame. oh and the dinosaur one: die or end up watching a movie? MEGAlame. In fact, those summarize this book pretty well. The role was not yours, the interaction with the Animorphs not anything like their canon behavior. I'm always wishing for new plots in alternamorphs. In using old ones, these were from good books, but just riping them out of context, you lose so much (see below)
3. Like the komodo. Fascinating creature would have been cool to see more. I always picture myself with a lion morph, golden eagle and/or Northern Goshawk, shark, fly, roach, rattler, gull, wolf, couple dogs. I'm trying to be practical here, but really I'd try for any and every animal I could get.
4. In terms of adventure it does fine, but in terms of characters and theme, this books do nothing. You could say they aren't supposed, but being with Animorphs 65 mya is not the same as being with the Animorphs actively protecting modern Earth from Visser Three's plots. I almost never read them when doing the rest of the books, but if they are going to add in a parallel universe to Aniverse, it could have been different, but kept the ideals.
5. This is tricksey. I've said that on seeing Elfangor at the start, I'd likely have run away. But having gone through an extended time as an Animorph, I think it's more likely I'd go back for more (ignoring all the personal, losing family stuff). Maybe confidence, maybe a bigger sense of responsibility, but knowing that I could survive all that hell and manipulation, knowing what was going on, having the power, I do think I'd go in. (Course I'm not sure how it would work in the context of this book with the Ellimist being all pissed that you were but, eh.)