Some costumes are long past their cultural moments and yet remain stubbornly prevalent, making them less "throwback" and more "[yawn]." Please allow me to offer alternatives that, while perhaps unoriginal, aren't ubiquitous.
Amy Adams as Margaret is excellent. Christoph Waltz's over-the-top portrayal of Walter -- who, by many accounts was truly over-the-top -- can be a bit distracting. At any rate, it's an interesting exploration of how the "little hobo kids" became a household must-have.