I very much doubt that - her character in the Dark Shadows pilot was killed in a few scenes, so she wouldn't have been a cast member even if it was picked up. I just think Reilly wanted to kill one young person on the canvas and unfortunately Cassie was basically related to everyone at that point so it made sense to off her.
On of my best friends has created two SB books with an episode guide for the 2137 episodes for himself. It is wonderful to have the summaries of all the episodes with more than 700 pictures from SB press kits.... I love SB!