all of the visions of dead folks/spirits/ghosts will have a payoff in the last episode or so, because so far, they just seem like unnecessary flourishes whenever they appear on the screen.
And I also hope they don't happen to 'haunt' that killer nurse when her storyline concludes for the season finale.
"Sean sparks like John Starks, nah, Sean ball like John Wall" - Rest In Power Forever Sean Price.