That is true. But...there is time for rewriting, deleting, changing course. The most important thing right now is to slow down the filming, and get some bright light into the gloom, misery, darkness, despair.
There is NO REASON that every character who was earmarked to leave, whether by choice or not.......had to be killed. That is lazy writing, even if it gave a couple of actors some scenes in which to absolutely SHINE!