That was probably my only complaint with the episode, that several of the characters did out of character things. I feel like Ferb would at least attempt to calm Phineas down, Candace wouldn't care about Thor and would still snitch on them, Isabella being denied from helping sounds like an ass move. That being said, the special is vastly outweighed by positives, like Doof hanging out with the villains, the superheroes, them being semi-superheroes, it to me wasn't as good as the Star Wars special, but it was up there.