I suggest that the World Cafe is a better choice when the management needs to do some deep thinking. The process of deciding on those questions for which they want feedback will increase management's commitment to listening to the output and initiating actions based on those ideas.
Yes, I think you are right. If management is the ultimate decision-maker wanting input from employees. Once people begin a Wisdom Council Process they soon discover that it's a revolutionary process, where the people (+management)co-create the ultimate choice(s). That's why it works so well in situations that are supposed to be democratic.