Sleep seems to work fine. The mouse on/off and volume keys work, The the fn+f7 key causes a reboot, and I don't have a brightness slider so the brightness keys don't work but everything else seems ok including facetime and imessage.
OK fn f7 should only turn of display on UX305 hdmi should remain on. You do have the patch for post sleep usb. If you do Fn+F2 are radios turned off (no wifi no bluetoorh), Fn+F1 put it in sleep mode?
Cheat sheet Function Keys:
F1 Sleep
F2 Airplane Mode
F3 Does Mac OSX function(Misson control/Dashboard)
F4 Does Mac OSX function(Launchpad/Desktop)
F5 Brightness Down
F6 Brightness Up
F7 Screen Backlight On/Off (Soft mode)
F8 Video Mirror
F9 Touchpad (only with my Elan Touchpad driver)
F10 Mute
F11 Volume Down
F12 Volume Up
C - Rewind
V - Fast
Asus Instant Key - Does Mac OSX function(Launchpad)
Space - Play/Pause
Left Arrow - Previous
Down Arrow - Play/Pause
Right Arrow - Next
Up Arrow - Toggles Media Functions Fast/Rewind and Prev/Next between C,V & Left, Right Arrows and
Toggles OSX Functions for F3, F4
Toggles Finer and Normal Brightness, Volume control
I assume you did not use FastLanePackage, a full list of patches is contained in [Guide] Asus Zenbook UX305FA Using Clover UEFI if you need them.
Note: Save the information in config.plist smbios it needs to match if you make changes since you are already signed in to Apple.
jhawk