iMac Pro, Logic X 10.4.4, three orchestral instances., ~30 MIDI tracks, no input audio routing, three stereo channels back to Logic. External plugins in VEPro7 are only Addictive Drums and a multi-output Falcon. All three instances show load less than 10%.
Random audio dropouts for no apparent reason and no alerts. VEPro6 works fine with the same settings.