I figure its because she wasnt meant to be a villain so she didnt have the mental prep or upbringing to be scheming and hide it well Chryselephantine
to add to that, the person she's trying to assassinate is very perceptive and cunning. Like she knew the changes and her new found achievements but she still tried to assassinate her like ghoooorl the brain is not braining.
For a "villain" she sure sucks at hiding her intent lmao