Answering my own problem, and maybe @schlonzo too. I was using 50beta35.8; 50beta36 seems to have the missing DX11 nodes.
And just to make it explicit, you need to install the RealSense SDK, and copy two files from the SDK install folder C:\Program Files (x86)\Intel RealSense SDK 2.0\bin\x64, Intel.Realsense.dll and realsense2.dll, into the rs_assembly folder createdby the zip file.
It then works for me, but the VVVV.d430.vl node is still red; inside I see the following red lines, but I do not know enough (yet!) about VL to diagnose it:
Edit: And yes I am seeing the same halts in display without Perfmeter2. Something to do with those error lines in the wait for frames area?
Edit2: If I open the Root_d430 patch, and move my mouse around in it, the display updates smoothly as long as I move my mouse! Whaddupwiddat?