The orange humpy pattern is a great attractor pattern for fishing on those days when not a lot of insects are on the water. It works well for me in the mid summer in the Western Us for cutthroat, but I have also had good success with it fishing in the East (specifically Michigan).
The orange humpy dry fly does not look natural, but it doesn’t need to. It will often convince some very picky cutthroat and brook trout that it is feeding time. This fly has a place for sure, it is simply a great attractor pattern.