I would of upgraded anyway because BIAB has something for everyone and I love getting the new RT's. I have owned BIAB since I was working as a Atari ST tech back in the day. I was most surprised by the announcement of the VST and I actually like the idea. The plugin certainly did not work when it was released but it is now functioning with a few shortcomings. I am confident PGM will work this all out and it will get better as we go along. I have always generated multi riffs in RB and whole songs in BIAB. Most of my work is done in Studio One Pro.
As far as it is the User fault and not the plugin, I really would not agree with that. Sure there may be some instance of them not following along with the correct steps in the video's or some particular setting in their DAW. Just by all the updated patches and corrections tells you otherwise. That's my two cents!
Brian