With sales of the PC edition of Batman: Arkham Knight suspended and refunds being offered, Rocksteady is "working like crazy" to put things right, and PC fixes have taken priority over updating the console version. Rocksteady's Sefton Hill tweets about fixing the PC version and how it is a top priority (thanks MCV). Here are the tweets:

Totally supported decision to suspend PC version. We have our best engineers at Rocksteady working like crazy to help fix the issues ASAP.

Thanks for the feedback! We hear you and are looking into it. Will keep you updated. (PC fixes come first)