are the new features: https://forums.unrealengine/showthread.php?59923-Unreal-Engine-4-7-Released!
and the full list : .unrealengine/latest/INT/Support/Builds/ReleaseNotes/2015/4_7/index.html
I don’t know if the new lighting system for the foliage may interfere with VXGI and your upcoming Turf , you should take a look at it. Thanks !