I bought my Virus TI2 desktop on last summer, and after some months of useless posts on this forum and emails to the customer support about my "out of sync" problem, I finally found the solution :
Never use the Virus Control VST with Ableton Live, it's only made for those who don't have an audio interface !
I only use the USB connector as a MIDI interface with the Virus, and the audio outputs trough inputs on my MOTU 828mkIII.
Traditional MIDI synth in MULTI mode, it's really safe using it this way.
But I agree with you: it's a shame to pay this price for a machine with so many small (and less small) bugs and ergonomic errors.