FX worked strait out of the box, put 'blackhole' in an old patch, no issues - all vst fx were just their (didn't scan), selected blackhole (long list, no sorting yet) and the GUI pops up, dropped an LFO output to the first input, moved a control on the software GUI and it was mapped- LFO controlling depth!
Very Cool
I haven't had as much luck with instruments yet, some work (All Arturia, All FXexpantion, Thorn) but a lot didn't (UHE. Synapse etc - they show midi input and I can modulate them, just no sound output) but I expect this will get fixed as people report it...unless its just me!