just did a clean flash of the 4-12 build and its great so far. took care of the keyboard backlight problem as far as i can tell.
also you CAN wake the device from a keyboard open + screen off state.
press W E S D all at the same time and it wakes.
there is another key combo on the right but im not sure which one it is.
i found WESD by smearing my finger across the keyboard. i do not know what physical wear this may induce on the keyboard so I do not reccomend it.
just look for group of 4 keys arranged in a square and press them firmly.
ill go and restore my apps from titanium and see what happens.
i heard not to restore system apps or settings even between nightlies!
so i only backed up my installed apps and data
also using the 3-17 gapps. it still wants to update gmail but has the play store at least