I rather enjoyed the film. And in the words of
MovieBob, would someone at Disney please tell Brad Bird that he is a very special boy and that we all appreciate all that he does as a great artist in this mundane world?
Okay, I rather liked the family dynamics. Seeing a stay at home Dad and his struggles at keeping his kids functional and happy, especially when they have superpowers, can tire out any father. Wish we had had more than one scene and a half with Edna, as she felt criminally underused. It was great to see actual superpower fights, something that was sorely lacking in the first one.
Now, for the Objectivism stuff. Superheroes main road block to saving the day is the governments of the world making it illegal for them to do so. It's only at the behest of a telecomm giant's president supporting them that anything comes of it. He even gets a hero moment where he rescues all the mind controlled ambassadors and heroes. There is no such thing as an evil super, only good ones under mind control. Rick Dicker is the sole contrary voice to that, and his age is apparently over as he retires in his first scene, and is only seen once more to apologize for ruining Violet's love life.
So, it's definitely there. But whether it'd due to Brad Bird's personal views, or the needs of doing a superhero story, I don't know. It does make me wonder if his next film, like The Incredibles, Ratatouille, Tomorrowland, and The Incredibles 2, it'll be about the mundane holding down the special.