After the Kitkat started with Nexus 5, the Nexus 7 2013 and Nexus 7 2012 are begin to update to the new android version. We tested the nexus 5, nexus 7 2013 and nexus 7 2012 with OTG Disk Explorer to see if it works. The locale issue in android 4.3 for nexus 7 2013 seems repaired. Here is a demo video for Nexus 7 2013 with Traditional Chinese locale with Kitkat. You can see the USB OTG issue is resolved and the OTG disk can be read again. Thank God!
PS: In the demo video, the very cute OTG card read is Meenova MicroSD Card Reader from http://www.meenova.com/ which is once a startup from
Their card reader works very well in a tiny size which integrate the OTG function and card read and it works seamless with OTG Disk Explorer.