I don't know... I read the intro and really it kinda rankles me a little bit to say that, after the first ten regular episodes, Star Trek was "all Gene L. Coon" (until his exit). As Maurice says, it greatly disrespects Roddenberry's very firm hand on the wheel in the first two years, as well as the great contributions of Bob Justman and D.C. Fontana, who both had tremendous creative say. Granted, they weren't producers, but they were heavily involved in the writing and story development of episodes written by others.
I too enjoy the early Roddenberry/Black tenure. There was energy and verve as well as true science fiction concepts involved. Coon brought a casual familiarity to the characters and brought in his sense of humor and some great lasting concepts. He did indeed help build the universe we love, but the operative world is "help." In general, Coon does not get enough credit, but ever since Roddenberry died, there has been a tendency to give people like Coon too much at the expense of Roddenberry.
For me, I found among the great things coon brought also came with a sense of sameness. Ideas became more and more recycled and fewer chances were taken. And, honestly, I don't think the series was best served by all out comedies. I prefer my Trek mostly serious with moments of character humor.