'working on my Clover setup and manage to significantly reduce the freezes though not entirely. Sometimes, system still freezes a few seconds after reaching desktop. But it seems to run pretty stable most of the time.
Graphics acceleration is acceptable at this stage though not bug free: occasional slow movements on screen and some contents leftovers after closing a window for instance. Or unrecoverable limping system of complete freeze after attempting to watch a Youtube video in Safari. But, hey, what can we expect out of a KBL framebuffer on a Skylake system?
Other than than, everything appears to work properly on the E7270:
graphics acceleration: Ok with some defects and reduced/degraded performance
brightness control: Ok
touchscreen: Ok
HDMI output: Ok
mini-DP output: Ok
audio (incl. DP audio): Ok
LAN: Ok
wireless & Bluetooth (BCM9460CS2): Ok
touchPad: Ok
USB ports: Ok
sleep & wake: Ok
SD card reader: Ok
Whether this ends up sustainable in the long run for Skylake laptops remains to be seen but you never know... Is it usable for the time being? Clearly not.
Edit: Instant wake issue on sleep and HDMI output now sorted.
EFI_Clover_r5146_E7270_13.0.b1.zip
EFI_Clover_r5146_E7270_13.0.b1_v2.zip
EFI_Clover_r5146_E7270_13.0.b1_v3.zip
EFI_Clover_r5146_E7270_13.0.b1_v4.zip