To be honest i can perfectly understand him, TI/VCP is out now for a while, and it's still struggeling with such teething problems, with every update some problems are fixed, but new ones are introcuded (at least for me :/). For example with OS4 the arpeggio is now totally cranked up for me, it's out of synch, it's jumping and stumbling while it was perfectly fine with OS3, though with OS3 others complained about sync problems - where is this going to end up?
Everyone knows that writing software for various OS and DAWs isn't that easy, but after ~5 years it's finally time for a stable version if you ask me, but instead more and more features are added, that's what many software is suffering from, featuritis - kind of. In the software world every once in a while there must be a feature freeze, giving the developers time to fix bugs and stuff, and personally i think that should have happend before OS4.
I love the Virus, but VCP is annoying me since i bought the TI one year ago, and integrating it via Audio instead of USB (like my old Virus A and B which are still in use) is getting more and more tempting. If someone would ask me if it's a good idea to buy it, well, if he would only want it because of the "Total Integration" capability, then my answer would also be no, not until it's finally stable.