I'd have imagined that the ideal camera positioning would depend heavily on the reasons for recording the action: If the purpose was to watch as a spectator for pleasure, the nicest angle is probably where the umpire sits, seeing the faces of all players and being on average as close to the action as possible without getting in the way. In this case a 180° camera would be the best for a fluid watching experience, but it might become dull after watching from the same angle for some time, and the current technology doesn't yet support sports speeds, at least in terms of frame rate.
If, on the other hand, the purpose is for analysis of the players, the ball, lines, or other technical aspects, point views for specific locations would always yield the sharpest results, but more cameras will usually cost more, at least in terms of installation, and watching the action smoothly from several angles will be much more complicated.
Are there any further guidelines available on the requirements?