Instead of adding sugar or artificial sweetener, try adding fruit juice for a new flavor. Mixing 1 cup of tea with 1/2 cup orange juice adds about 56 calories, 1 g protein, less than 1 g fat, 13 g carbohydrates, less than 1 g fiber, and 1 mg sodium.
In a small bowl, mix cream cheese, sour cream, vanilla, and confectioners' sugar with a whisk to make no-cook pastry cream. Put mixture on top of graham cracker crumbs. Top with berries. You can save some berries to decorate the plate. Refrigerate for at least two hours before serving.