How are you guys (the devs) getting Google Now to launch from the home key? Appears a bit buggy in my custom AOSP ROM.
Good question, I've noticed that too. Google Now has been somewhat buggy. With the exception of the pure OTA update on the latest Y patch for 4.3 (which obviously doesn't work with all the customization) - even some of the 99% stock JWR66Y rom zip files, once properly flashed - either get nothing ("No Card") or Google Now would work in one session & then unresponsive or freeze/crash in another session - I am guessing it might be related to the security updates/patches for JWR66Y as released ???
In any event, I'm running the Advanced Stock Rom Re(Y)loaded - and all is good - for the past week plus for me with the stock kernel (was on franko while on 4.2.2) Battery life is excellent & device is very responsive - I couldn't care less for aiming at a higher Quadrant score, LOL.
The DPI settings with the Tablet UI isn't working 99% and not having time to tweak the DPI & other settings, I left it alone for now and back on stock UI - same with the Advanced Power Menu - using "Quick Boot" to go into Recovery/Bootloader as necessary instead.