I see you're drawing to a close on this release cycle, and I'm kicking myself for not visiting this forum more frequently. But I'll throw this in as a request for a last-minute change or for your next cycle.
I use CC on my Kindle Fire Original (rooted so I could put on the Google Play store and get CC there), and it works great on that device. I use it almost exclusively to manage my book library, and connect wirelessly every day to Calibre to download my morning news.
The only catch is that after the connect/sync of the news, the Kindle Newstand app doesn't see the new issues (see
this old thread) until I dismount and remount my SD card. I am manually doing the unmount/remount, but it is a pain in the neck.
So here's the feature request, after all that buildup: could you add an option to CC to automatically unmount and remount the SD card after a wireless sync? (or, rather, unmount, wait for the unmount to complete, then remount and wait for the remount to complete)
Alternatively, could you provide a button that would do that same sequence manually? Showing/hiding the button could be an option so all of the folks who don't need it wouldn't see it.