Well I went for it and installed it earlier this week...
and afterwords I got the message "System UID inconsistent........." with an "I'm feeling lucky" button, hit that and that problem has gone away.
Along with the other things mentioned in various threads the most problems I'm having is battery life while connected it wifi is very draining as compared to before KitKat. Also my personal sounds (ring, text notification, voicemail etc) all had to be reinstalled/relinked. "Navigation" has also changed as I don't see any saved address that I've used previously and the way you put in a new address is different.
A new annoying problem is w/ the text notification is now the sound is truncated/shortened and VERY low. I've read various fixes and tried the following, moved the mp3 to internal memory...no change, unchecked the delete messages when max is reached...no change, tried a stock sound...no change only plays for a second or two. Used a ringtone editor to edit and save again...no change the only fix I've read is to delete ALL texts from everyone and start again from scratch with NO texts stored. That is something I or most don't want to do. The default program is "messaging" but you now have the option to use other text programs, the google new one is "hangouts" which I haven't looked into yet.
Anyone found a workaround for this? I'm not into jailbreaking or bootloader, so wanting a normal fix if one is available.