I would also like to add thanks. And finally coming round to my way of thinking with no search button, just leave it on the bar. I like symmetry :-)
Edit 1: I'm also having issues with system.ui but hey what's new :-) just getting fc and no keys at all. Trying a clean install now with custom options otherwise will nandroid and try again tomorrow. Kinda liking the new boot screen
Edit 2: with a full wipe and install it works no problem
Search button is kind of not needed anymore, long pressing the home button you can go to search. Symmetry is an other thing, but we could use that space to something else mayne?