If you look at the PC performace thread on neogaff the Xbox One is doing pretty well compared to the perfomace of the game on PC's with much more power.
I've been playing the game since launch and the performace issues aren't a problem when your playing. It's not like killzone where the shyt is constantly stuttering and slowing down. It stays at 60 for the majority of the time when your playing. It drops when shyt gets heavy, but at those times it's so chaotic on screen that the frame drops aren't really noticeable. It's never a "slideshow".
Why are you lying? The framerate dips constantly in this game