Basically the ModMatrix/LFO automations of the various knobs/faders should be showed in "realtime" in the VST.
The visual feedback would use the "lights" around the knobs and over the faders to show the automation.
The VirusControl already knows all the ModMatrix/LFO params and also it knows when (and velocity) of MIDI notes triggered so for calculate all this directly in the VST shouldnt be a problem at all and it would give 0 load to the hardware unit.
Here is an animated image of my VirusControl with this cool feature.
[Blocked Image: http://img132.imageshack.us/img132/1433/vc34.gif]