Lincoln Center Theater's Epiphany begins with an ominous rumbling that's so mighty it might measure on the Richter scale. Dishes and glasses on the set clink and chatter. The effect seems to set the stage for something of enormous magnitude. Don't hold your breath. Brian Watkins's intriguing, but ultimately blurry and low-impact, group portrait inspired by James Joyce's The Dead emerges more like an artistic exercise or theme and variation on that famous 1914 short story than a fully satisfying...