It's pretty damn harsh. She was one of the truly innocent characters on the show and that's an awful way to die.
So I'm guessing by the show's title, Mother's Mercy, she's going to unchain those other dragons tonight.
So what is the watch going to start hunting all the wildlings they let through? If not killing Jon seems pretty damn pointless.
Also what the fuck theon and sansa? Was that a suicide jump or are we suppose to believe they survived that fall?
If melisandre doesn't bring him back I think I might actually be done with this show. I really don't give a shit about any of the characters left.