To me, the issue was personnel. On the Wings, you've got four slashers who can all beat their (wo)man to the basket: Arike, Paige, JJ, and Aziaha. Carrington provides better defense than all but Paige but there just wasn't a need for another, especially since Carrington is a streaky shooter from outside.
By contrast, the Lynx really didn't have a true three-level scoring guard - Williams can get to the basket but she prefers the pull-up and is a lot smaller framed and so less successful at drawing contact. And McBuckets can get to the basket with the right matchups, but her strength is the basis for her nickname, and she doesn't have the quickest first step. Carrington added a true missing piece for the Lynx, in addition to outstanding D.