Is there a reason we haven’t gotten a blue fairy flashback yet? It’s things like that which make me think she’s more important to the end game of this show.
My dream series finale – They have Blue just lose her crap and freak out because “I’ve been sitting back, trying to not help you as much as possible, waiting for you all to destroy yourselves for so long now, and so many times you came SO CLOSE and my ultimate goal was NEARLY realised. But I can see now that you morons are just too incompetent and if you want something done right you’ve just gotta do it yourself!” Then she’ll enact some spell that’s a cataclysmic Storybrooke ending event, and the last thing we ever see is a smug looking Blue wandering through the desolation and then out into the real world to wreak some havoc.