The fact that Maisie approves doesn't mean its accurate or that she cares about it very much. She likely has very little concept of what 1/6 collectors look for and the level of detail needed. For example, the 6 inch dark horse figures often have poor likenesses and the actors approve them because they either just want the money or don't care how great the likeness is.
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As a matter of fact, I believe the actors (at least on GOT) even get to approve their likenesses for Funko POP figures! Which I find endlessly hilarious.