Like with my post production software set up I am a big shortcut fan. Here is how my keyboard short cuts look at present suited to Aussie Rules Football;

Number pad 1 - Cut to live camera
Number pad 2 - dissolve into replay
Number pad 3 - cube spin back to Live camera

We also have shortcut keys for changing the scores (+6 or +1 for either home or away team)

Suggestions

Number pad 4 - Make replay play at 50%
Number pad 5 - Make replay play at 75%
Number pad 6 - Make replay play at 100%

Whilst its possible to use the slider near the replay window to slide the replay time up and down, I personally find it fiddly and would prefer to be able to hit a number pad. It would be so much quicker.

Sorry if this is already a feature but I couldn't see it in the shortcuts.