Changes to this show badly needed
First of all, the idea of making audience members such a large part of this show needs to go - these segments always looks awkward, forced, and amateurish. . You can tell sometimes that some of these audience members are probably thinking, "Look at me, I'm on TV. Maybe someone will discover me and I'll get my own show!!" What makes it worse, is often I get the impression he's just winging it because he seems so ill prepared. I get the impression that he found out what topics were going to be discussed on the show only minutes before going before the camera
Secondly, Dr. Oz needs to make a conscious effort to sloooooowwww down his super fast rate of speech. His words sound garbled half the time.
It also seems that sometimes he's trying to put too much into each show, as though it were catering to people with ADD who can't concentrate for more than a few minutes. For example, sometimes he'll have a celebrity guest to whom he'll speak with for a couple of minutes, and then suddenly he'll leap from his chair (abandoning his guest) and he's off to his computer generated explanation of whatever it was he was talking with the celebrity about. The guest seems surprised and perplexed about the sudden end to their conversation.
Also, as others have mentioned, the show seems to be primarily geared towards women and children. It would be more watchable if it were geared towards educated men and women.