Serving sizes are a scam to manipulate nutritional labels. What we need is what Europe has - what percent of food is what. They have that by making the nutritional label for 100g.
Another thing that would be helpful, is not putting raw calories on there, but putting metabolized calories on there. Looking at a nutritional label for dietary fiber makes a person think they're eating a bunch of empty calories, when they get pretty much zero. Why is the nutritional label showing how many calories are released if I burn the food in a fire? Our digestive system is not a BBQ grill.