I suppose the issue is it's all rather shallow and comes across as very perfunctory. Particularly when contrasted with its predecessor. I still like the Rebuilds a lot, though, and I do enjoy that it's more of a re-imagining rather than a direct reproduction. So, points for taking a different direction, but it's certainly a much more conventional direction than the original series, which was a very unique creature.
I am very much looking forward to the fourth movie. Hopefully that comes out by 2017 :/
Edit: A lot of my thoughts are actually in this video - https://www.youtube.com/watch?v=jfM3WjyCt8s