JWhip - I have a somewhat different opinion on what should be the "main" camera. I want to see the catcher's signs and how he catches the ball (glove placement over the plate)- hence a center field camera.
Tim McCarver, who I think is one of the best analysts in the game (and an ex-Phillie), has an excellent discussion of camera placement in his book, "Tim Mccarver's Baseball for Brain Surgeons and Other Fans". There's an excerpt online at the NYT, you can get the Google cached version here: http://220.127.116.11/search?q=cache...ient=firefox-a
(If not, Google search for "Tim Mccarver's baseball for brain surgeons and other fans site: nytimes.com", the page is cached)
Baseball is a game of angles. In this excerpt, I believe your press box view would be called the "high-home" camera. The article appears to be circa 1998, but I don't think anything but the ESPN K-zone box have changed since then.
I think the key is to have some really good producers who understand the nuances of the game and can work in real-time. As an example, I thought that the home opener (KYW) camera views were more in-tune with the game than Thursday's game (ComCast). Different producers?