I say the hell with CM, we don't have nor IMO will we ever have the Dev support for porting CM to this device, I say we just continue porting features from KitKat over to our custom rom for this device cause I believe that's the closest we're ever gonna get to Android 4.4+... and yes this device would run KitKat if we had a proper build from source for it cause as you've said Google already stated that it was made to run on lower memory/lower end devices, besides I've already ran everything that was in the system dump for Android 4.4 for the Nexus 5 minus the Desk Clock and it all ran well without a hitch, so don't believe the hype people, the Rush could undeniably run KitKat and do it with ease... Just some informative words for the nonbelievers to soak up...