The penultimate episode of American Horror Story: Coven, “Go to Hell” finds the series still desperately scrambling to introduce busy conceits. Theoretically, we should be eagerly anticipating the revelation of Fiona’s (Jessica Lange) successor as the next Supreme, but how can we? As an audience, we never know if any event “counts,” or if it will be reversed to satisfy a new creative whimsy. The first two or three hundred character resurrections were a cheeky way of illustrating Coven’s ’s willingness to screw with viewer expectation, but that device, along with the witches’ highly varying procession of week-to-week powers, has long ago devolved into tedium. And somewhere down the line, creators Ryan Murphy and Brad Falchuk also lost a valuable sense of pace: Major events seem to rush by now in a barely coherent tizzy, while negligible vignettes eat up a significant portion of running time.