Well, all I can say is that Scorpius is anything but a one-note villain. He has more depth than you could possibly imagine at this point in the show. Sure, right now he may just seem like an evil guy in leather, but I guarantee he is anything but.
First impressions can be important, but I think you may put too much stock in them. You've already decided that future appearances of Scorpius are going to suck after only seeing him for half an episode.