I used to love the Duke for shooters. Unfortunately there's too many commands in today's shooters and you need those black and white buttons to be easier to access on the fly. Elite controller killed my desire to touch any other controller. Last gen this would've been a day 1 purchase.
My launch unit had the Duke, but I bought another system as they were being discontinued and it had the newer and smaller controller. They changed the location of the black & white buttons and other stuff. I have big hands, but still didn't like it very much.
Honestly if the Elite never came out, I would've purchased this. The black and white buttons had horrible placement however if you were playing a game and didn't need quick access to those, I preferred Duke over S, Xbox 360 controller and OG Xbox One default controller.
The spacing of the sticks and triggers felt great in shooters. Until the Elite came out, my shooter accuracy was best using Duke.
If they didn't do such a great job with the new Xbox One controller, I could definitely have seen something like this as being my main again, but yeah, I don't think the intention is to give the Elite or Xbox One S controller a run for it's money.