Board Thread:False Info and Speculative Discussion/@comment-26934179-20150830193056/@comment-7603754-20150905191110

Lydia was the only other one they could have killed at the time. And with the actress leaving, that would take out the two most important women of the series. That was never going to happen. She died because it made the most sense to kill her. Besides, the hunter storyline was over, the argents were basically all dead, and Lydia was just starting to figure out what she was. Allison we already know: cute, troubled archer.