That's the thing you know? I guess they won't put it to much use but more of a aesthetic "Wow, that looks cool!" sort of thing. But I hope Kobayashi proves me wrong cause I really want to see them heads do something.
But now that I think about the Rhino head could work, cause you know how SaGoZo is apparently a melee type? So having poor eyesight would make him always go toe-to-toe with his his fellow Yummy/Greeed. Not really an advantage though, right?