Then you take a NPC like Jaina, who doesn't have a questline centered around reuniting her spirit, we don't see her fall in love and have a baby, we aren't left with much to do but piece together the story from the few major moments we share with her in the overall narrative. She was in love with Arthas, a tragic end to that story. We got to do that 5 man in ICC where she encases her former boyfriend in ice, helps us escape him. We hear that she was the lone survivor of a terrorist attack on her home town; we get to help her avenge that misdeed. Bit by bit we learn about her, I think her story arc, while not as 'in your face' as Thrall's was in Cata, is more wide reaching over the course of the last few expansions. Aside from Thrall and Garrosh there's not many characters that can be said about, imo. She'd be the perfect candidate for something shocking - and not just her dying! Someone else in this thread mentioned that she could die and be reborn by the Valkyr Sylvannas has sneaking around Orgrimmar during the raid. That'd be epic!