I flashed mine from 1.2 to 1.4 on the 30th of July using the PC Controller tool of Simplicity Studio. So far, my controller has been much more stable and responsive. The “jammed” and “unavailable” statuses have been greatly reduced to once or twice a day and then for very short time (few seconds). On 1.2, there were multiple times a day where the controller was jammed and/or unresponsive for significant lengths of time.