Personnally, I found that using the Diabetic exchange system an easier way to keep control of the amounts of carbs, protien and fats because I am choosing foods from specific categories. For example, a veg is from a veg category, not from the carb category which is starchy.
Not very many people like that system, but hey, it's whatever works for each of us, right?
However, when you lump all carbs together you much be dilligent that you get enough but not too much of those macro nutrients. Most diabetics usually get way too many "carbs"
My best suggestion would be for you to see a Diabetes Nutritionist. By that I mean someone who is experienced with diabetes patients. Many nutritionists, although very good generally, so not have the experience that diabetics need to help them build a balanced meal plan.
And remember that every diabetic is unique so the progam must be customized as to what works for the individual. That means, test, Test, TEST. It takes a lot of hard work, diligence and experimentation to find what will work for you.