Hello, I had the CSC failure issue and saw this post. Thought I'd update as it mentions. I did also file a report at NHTSA.

2012 Roadster
VIN: 370274
Purchase date: August 2013 (i am second owner, purchased Sept. 2015
Occurrence: November 2015
Occurrence Mileage: 10,700 miles
Clutch type: OEM

Summary: 2nd owner. Purchased at 7500mi. Failed at 10,000. Tried clutch fluid trick. Useless after 2 days. Notified NissanUSA. Complained. Replaced CSC. Under warranty. Filed report with NHTSA.