[Kranar]

Would it then be preferable for the manager to be more direct and assertive and state "In order to continue being employed here, you will need you to work overtime."

To me there needs to be a differentiation between communication style, and consequence. If it is the case that your job is at risk unless you work late nights, is it preferable to be direct about it, use assertive language, or is it preferable to use NVC, and express ones feelings and other details that form some sense of empathy?