Installed it yesterday, played for an hour, uninstalled it.
1440p, Ultra settings. I didn't have a FPS meter on screen, but if I had to guess, I'd say it spent most of its time in the 40s, up into the 50s if nothing was going on. Maybe lower here and there based on what I deemed "too much motion blur", meaning it was dealing with lower framerate. I have G-sync, so it stayed smooth more or less throughout except for occasional straight up dips where it held for a quarter second or so, loading or whatever.
i7-2600K @ 3.4GHz, 16GB DDR3 RAM, and a GTX-1080. Both my CPU and HDD were maxxed out the entire time the game was running, so it was clearly struggling, CPU-bound (I know I'm using an old-ass CPU), and constantly streaming data from the hard drive.