If the Virus TI2 is still on the update list (which should, because it is still not obsolete by far !!) I would find it really useful to have the option to limit the number of voices in a patch.
It can get pretty messy and loud to play a patch with a sustain pedal while playing the same key a few times.
So a way to limit the voices to 16, 12, 8, 6... or whatever would be appreciated for "live playing as a traditional synth" if that make any sens.
The Unison feature will reduce polyphony if that's what you mean. The only drawback that I know of is that it may also increase volume but you can turn that down with the main volume knob.
Hope that helps!