It's awful.
The two note "theme," if you can even call it that, sounds like a direct slice of Chopin's famous funeral march, and done in a way that it also brings the Imperial March to mind. Totally lazy, and if I caught that on first listen there is no way a guy like Giacchino didn't know what he was doing while working on it. The rest almost sounds like a first pass on the piano at chord progressions and he just went "yeah that's good enough."
He might have gotten direction from the director to do that though, who knows.
For those who don't know what I'm referring to (though you'll recognize it the second you hear it since it's one of the most recognizable pieces of classical music on the planet):