I'm alarmed at how high each of my PCF figures are for protein, carbs and fat. Would it not be simpler to break these figures down and provide a ratio I can apply to each meal as the Zone does?

The principle behind PCF is to allow for a wide range of variables including:

differing ratios of Protein Carbs and Fats - depending on goals, activity levels, age, gender etc.
personal choice as to number of meals a day
a wide choice of actual foods that support goals

Unlike the Zone, Aussie Bodies, with its PCF formulae, does not promote one type of eating or one set ratio of protein, carbs and fat.

PCF also makes it easy to account for small snacks, not just main meals. When looking at a daily allowance for Protein, Carb and Fat, the numbers can seem large, but as long as you have completed the PCF Calculator correctly, being clear about your goals, then they will work for you. Remember that your PCF figures may be spread over 4 or 5 meals, so the figures would be approximately one quarter or one fifth the total.