I wouldn't say Vegas RUINED it, but I did think they allowed him to go on a bit too long. I like him, I like his act, but it's not necessarily what I watch QI for. Say they had him popping up on the news, or on a James Bond movie, or in the middle of Hamlet. Although I might think he was funny, and though some people might think he improved the experience, at the end of the day his particular style is not what I watch the news, Bond or Hamlet for. Likewise for QI.