I don't know. What was her goal again, world domination? If that's the case I suppose it would depend on her intended policies and leadership capabilities and style. The world under her iron but fair fist may not be so bad.
A single immortal supernatural entity ruling over all of humanity could go a couple different ways. Aku brought technological development and contact and trade with alien peoples, but also deliberately made his subjects' lives shitty just for the sake of being evil. Sorry to be the guy who drags 40k into an unrelated thread, but that does have a very different but similarly unfortunate example. The Immortal God Emperor only wanted what was best for humanity and lead them into the age of space exploration and colonization, though things went to shit later. How would she compare?