Users affected by this broken OTA update have already used Reddit and Asus’ forums as sounding boards, and hopefully something will be done sooner rather than later.
Not only that, while waiting for Asus to fix the issue, it looks like this is an unsolvable issue – not unless you are willing to take the step to root the device, of course. Similar to other consumer electronics devices that have a software operating system, log files are created on the ZenFone 2, too, and they are meant to be trimmed automatically from time to time to prevent filling up space too quickly, and it looks like this function is being prevented with the latest update.
Not only that, such log files have been stashed within the system area partition of Android, and that is one area that remains inaccessible without root privileges.