Simple. No ability to control the first screen.
Social. A awkward attempt to integrate Twitter and the concept of checking-in. Low.
Seamless. While there is a "Where to Watch" button (and a search capability), it only yields the channel and time on which your show is scheduled to appear (like an EPG). None.
Discovery. I don't think flipping thru an EPG is a discovery feature. There is the attempt at "similar shows" feature (also often un-populated, even for "Revenge", a current popular show), but without any knowledge of your own preferences, this is more like an Amazon "people who bought that, also bought this" approach. Low.