Losing any of them on the show would be heartbreaking, but Troian has just admitted in an interview with W that she WANTED Spencer to die.
"I definitely tried," she began. "A) You want a death scene, and B) On our show, your character becomes infinitely more interesting when you die. I honestly felt that for this world to be truly dangerous, one of the Liars would have to die. Otherwise 'A' is just always putting them in danger and still saving them."
Okay, so she makes a good point... but what would they do without trusty Spencer?!
Uber A has still yet to be revealed, so we still have that to look forward to, but pls, no deaths.