Re: Camera position
All the American networks that covered tennis either with their own cameras or with some kind of ability to select camera angles from the native source (NBC, CBS, ESPN, USA, and even ABC) would sometimes switch to a lower camera angle during play and definitely on replays. I am surprised if it is not used that much anymore, especially in the new-fangled venues.
The camera work in other main sports has advanced by leaps and bounds, even compared with the 1980s. Believe it or not, back in the 1950s being able to show both players and the ball simultaneously made tennis the most television-friendly sport, along with boxing. But then the technological limitations were overcome, and in a lot of other sports, The Powers That Be are constantly looking for ways to make the TV-viewing experience better, so they aren't afraid to experiment with cinematography and sink some money into gadgetry. Tennis could certainly afford to be a little more creative with the game's TV presentation, especially with all the time between points. No reason they couldn't show just how high a serve kicked up or just how barely a slice cleared the net while the players are fiddling around. Of course, this requires directors who understand the game well enough to know when a point was spectacular because of the players' court positioning and/or when a point was spectacular because of ball altitude. And when to just show a nice tight butt shot.