Well, for one, the Kyuubi is a smart little devil. It's not having any of that wood sealing shit this time around, so it destroyed that necklace right away.

If Hinata survives because she used her chakra to protect herself, it would be ok. But well, I don't believe that characters dying is necessarily a good writing device to evoke a certain emotion so yeah. I don't care for deaths just for the sake of death.