This young Off-Broadway season has already seen two new plays riffing on Macbeth, both written and directed by women and both having to do with college. Sophie McIntosh’s Macbitches, which wrapped its run at the Chain Theatre a month ago, was set in a university theater department that’s shaken up when a freshman wins the role of Lady Macbeth instead of the star senior. And now Primary Stages has debuted Peerless, Jiehae Park’s fast-talking dark comedy about Asian American siblings hell-bent on getting into the most prestigious university.