Simple?
Oh hell yes, simple flies catch fish (e.g. the skunk). However, while your fly has a simple wing, the rest of the fly is not. You have a tinsel tip, a floss tag, two sectioned body with ribbing, a hackle and a collar, and JC cheeks. Compared to a full-dressed Jock Scott, it may be simple, but really, its not. And yes, I think that fly would hunt.