I also think most of their originals are good. I thought The Good Dinosaur was awful though, and can't understand how it could have come out of this kind of long process of iterative refinement.
It's ironic because The Good Dinosaur would be a good example of them taking a bet on a somewhat unique vision (a dinosaur spaghetti western?) with a more mature outlook, and then getting shit on by reviewers because it wasn't as funny or charming as Inside Out.