It worked but only without Azul drivers loading. I tried all values for IntelAzulFB. Also tried with Clover and injecting EDID. Every attempt to activate QE/CI resulted in failure. The system was manipulating the backlight as late during the boot process the backlight level would change from full on to ~75%, but no image on the screen.
I did not have a mini-HDMI to see if there was a signal on HDMI. Also, without networking I was unable to login with VNC (I don't have any USB WiFi either). To be prepared properly for this you should have USB WiFi and/or USB Ethernet that is ready to go with OS X. I did look at system.log and it looked like the "window server" process was crashing.
The unit has Intel WiFi. It will not work and will need to be replaced. Looks easy once you remove the back panel. Take a look at the service manual for details.
Audio should be possible, it is Realtek ALC263 (going from memory). Simple matter of patching AppleHDA (not easy, but well known as a solution).
Trackpad works great with my VoodooPS2.
I wonder if some future version of OS X might make the graphics work. The Haswell MacBookPro uses a special build of OS X. So maybe those drivers have changes to enable the retina display (previous Haswell Macs were not retina).