If the article truly is "The ten most important players in the Finals" than Wiggins at 3 seems right. If your GSW you know what you are getting from Curry, Klay, Dray, even Looney. Wiggins is their wild card x-factor. If he has a good series like he did against Dallas then the Warriors are in much better shape, if he struggles against our length then GSW is in trouble.
Hence him being so high on a list of importance.