There is no need to drastically change the controller shape. Some people are so used to being led around like mindless zombie consumer sheep, that they suck up all the marketing and sales hype like piglets nursing on a fat sow. Companies will tell them how their product design is the "best ever" and how it is so perfectly designed because of all their research/experts/experience/etc. That is, until they need to make more money by completely redesigning it and convincing you that what you have now is crap. Look unless the human hands suddenly change shape, I think they had it right to begin with. They know it too, but they realize that people are just waiting to be told otherwise so they can be led by their nose rings to go buy something new.