Specific: Did Hodor need to die? It seems to me that Hodor's entire reason for being was unnecessary.
I haven't watched the show or read the books, but social media more or less exploded over the Hodor thing, so I had to look it up at the time. One thing I noticed in my research was that he doesn't die in the books. So I would say that at least GRRM didn't think he needed to die.
I must admit, after reading the synopsis, I was impressed with the show's writers to have come up with such a clever retcon to fill in that character's history and explain how he became the way he was. Good time travel gag.
Related fun....
GoT producers apologize about Hodor:
https://www.youtube.com/watch?v=6xpG74e_-94J. R. R. Tolkien vs George R. R. Martin, Epic Rap Battles of History:
https://www.youtube.com/watch?v=XAAp_luluo0