I do number 2 with a lot of my dinosaurs because I’m trying to keep a certain level of ferocity amongst all my dinosaurs. My son also does that because he really likes the animations and doesn’t want to “use them all up”. I can tell you from experience that people do all sorts of crazy things for many different reasons that we could never think of, and those are the kinds of tells that indicate that it’s real people.
As I mentioned if the AI did silly plays that didn’t make sense, that would be a more realistic AI than the one we have that always tries to do what it thinks is the optimum.
For number 1, I don’t have any direct evidence for this game, but I don’t know why you think that is not expected in this type of game. People who are very much into a game will gladly go into the store and spend hundreds of dollars to get the cool pack with all the newest cards/creatures/characters, level them up and send them into battle as soon as they come out. That is not uncommon in mobile gaming.
Having said that, you could very well be correct and it could be that the devs are inserting more instances of teams with the latest dinos, but I wouldn’t really think they would need to.