By Daniel Fienberg Chief Television Critic Despite a tremendous cast and ample, if sporadically utilized, charm, HBO‘s Rooster suffers from a surfeit of loglines and an insufficiency of focus in deciding which one it wants to follow. It’s a show with an excess of underdeveloped identities, rather than a lack of identity, spackling over its poorly fused story elements with a sense of humor that’s sometimes appealing and frequently desperately hacky. Rooster is the story of an introverted pulp fiction author (Steve Carell), who is nothing like his macho alter ego but gets the opportunity to change his life when he gets a job as writer-in-residence at a small New England college. Or maybe… Rooster is the story of a successful novelist (Steve Carell) who never went to college, but gets the chance to recreate the coed experience when he gets a job as writer-in-residence at a small New England college.…