A lot of the plot seemed a bit contradictory, really. There was lots of stuff about being unique and who you should be instead of who others want you to be, but the story's climax sees everyone returned to "where they're supposed to be" (Roz to the other robots, Bright Bill to a flock), without much unique about them remaining save for the occasional visit to one another or Bill's stunted growth (and this is treated as a good ending).
Roz was also supposed to leave the island and everyone she loved behind... three separate times, with each time being treated as a huge big-deal thing by the music and the plot, but the first two were fake-outs so the third didn't seem real until the credits rolled.
There was a lot of awkward pacing as well? I suppose that's just a kids-movie thing. Within the first 20 minutes Roz already knows how to speak to every animal, and every animal knows how to speak to each other, but apparently not well enough to understand a gosling's chirps or a fox's yips. Roz's transition from "pure unfeeling robot that speaks only in binary" to "feeling robot that speaks in human" felt like it came out of nowhere, with her manner of speech only changing after a scene which took place after a timeskip.
This was especially impressive in a movie that felt twice as long as it actually was.
