Wanda driven by emotion? Nope. Maybe in her aims, not in her means.
And personally don't think she want to be an overlady (?). She can have some puppet (Stanley/Jillian/Parson/Ansom/Banhammer?) serve under her as her boss. That gives her the time to pursue her hobbies. What's the point in ordering some infantry around and waste time with other overlords, when one can master the forces of life and death?