From DevDex project
Locked FPS
Additionally, many gamers have been bemused to find a 30 frames-per-second cap in place. Thankfully, a work around has been discovered. All you need to do is open your Arkham Knight install directory, and navigate to, "\BmGame\Config\BmSystemSettings.ini”. In the config file, search for "Max_FPS=30", and change it to "Max_FPS=9999".
SSD destroying DRM
Batman: Arkham Knight contains Denuvo DRM, this not made clear on the game's Steam store page
[Lots of allegations that Denuvo destroys SSDs from consumers with media allegations that it is a false rumor. Tests so far shows a lot of writes to SSD.]
Overpriced season pass
$40