Hmm, comparing official artwork, the eyebrows are pretty much the same, it seems the 3D model for Dual Destinies just doesn't prominently display them as well as it should. Other than that, I see your point, in my pants, the birdlike analogy is something I didn't think of, in retrospect. I always attributed that to the Turnabout nature of the trials. Still, my preference stands, though it's more a matter of taste.
(Come to think of it, if we're discussing Pheonix's designs, aren't we missing two in our pants?)