I'm not sure either place is a perfect situation. In AEW, there's some decent women to work with like Toni Storm but they have a history of terrible booking in the women's division. But she would likely get paid enough to the point where she's got some creative control.
In WWE, she'd also be paid well and she'd have better talent to work with but the issues there are still similar to when she left. Maybe not as bad but Charlotte and Becky are always going to be forced on us and she has to navigate that. Bianca has still had to navigate that too but it's not as bad as it was.
Now might be the best time to sign to WWE if she was going to because Charlotte is out for a year.