I suppose the Nexus presents a pacing issue? We're late in the film, closing on the climax but throwing Picard into a comfortable christmas dinner and Kirk ino a nice morning doing chores. I'd agree playing up the heart-wrenching side of Picard's decision to leave, might have helped.
Have to admit I didn't like the Data story. It's goofy, he shortcuts his path to learning how to be human, and I don't really see how it fits with the wider themes of the movie.