Those weren't the fictional parts of the movie that piqued Frost. They were the parts about Frost:
I voluntarily gave up my rights to editorial control of it. I'm not complaining but it does mean that 10 to 15 per cent of the film is fiction. I wasn't just a talk show host before (Richard Nixon). I'd done British prime ministers - Harold Wilson, Ted Heath - all the U.S. presidential candidates, Robert Kennedy, Ronald Reagan. I think Peter (Morgan) did it this way to make me out to be the underdog - more a showman than a journalist.For Nixon insider Frank Gannon's review of the movie, which received the coveted full five Checkers rating at The New Nixon, go here. Mine's at the second link above.