I'd expect a legbar cross to have a crest (but then again, you'd expect an Ameraucana cross to have muffs!). Either way, all this is making me think that if she is a EE she has to be a multigenerational cross since she doesn't appear to have either muffs or a crest.I'm thinking she's an easter egger but a legbar based one. I got 2 last year that could pass as red sex-links but both laid green eggs. Mine were from tractor supply which uses hoover. I suspect that they did some kind of cream legbar rhode island red mix
Be sure to update us when she lays! A green/blue egg would obviously mean EE, though a brown would be inconclusive.