Well I got the kitkat update today. Haven't played around with it much so not sure all that has changed. I do know when you pull the window down from top the window is smaller but so far that is all I have noticed
Currently, the only way to keep the keyboard connected for more than a few seconds is if I also connect a streaming device, like a speaker or a headset. I'm hoping the update will fix this, because that's the only annoyance I've encountered so far (besides the effin button placement )