I like Matt's style, and his argument has substance. Sunshine is definitely ********** and undervalued. When put against the rest of the dreck released since 2000, it comes up very high. I think it all boils down to whether you like it more than Moon, and whether you're a person who thinks Avatar's visuals are the be all and end all.
A lot of people seem to view the turn into psycho-stalker territory as some kind of weakness; I never did. It sends a jolt through the film, that I like, and gives you a two-for-one feeling, in a From Dusk Till Dawn way. Nothing wrong with that.