I think the point is more, when someone says something like “you’ll never see the twist coming in next week’s episode,” you probably will see it coming because you’re watching and waiting for it instead of being surprised by it. There are a lot of ways to spoil someone’s experience beyond...
She is a phenomenally talented actress, but maybe even more important for this project, she can perform very well in green screen and CGI environments in addition live actors, which is not a skill that everyone has. I always believe Maslany when she performs.