agreed about the villain thing. That part of the movie didn't feel very well thought out IMO. It also sorta negates some of the effort they go to to show Carl as this frail old man who can barely walk without his stick, by having him running and jumping around like a 20-year old for much of the finale of the film. Also, I don't think it was ever explained why the villain guy had all these "intelligent" dogs. It was fun to have the dogs talk trough their collars, but then they were also flying airplanes...?? That seemed a bit random to me.
Still great fun overall though and all the other characters were great (esp Dug the dog and the crazy bird)