Place 2/3 cup mini kisses and milk in small microwave-safe bowl. microwave at high (100%) 30-45 seconds or just until melted and smooth when stirred; spread evenly over crust. Cover and refrigerate.
Beat neufchatel cheese (or cream cheese) in a med bowl until smooth; gradually beat in sugar. stir in peanut butter and whipped topping until blended; spoon evenly into crust over chocolate mixture. cover; refrigerate until set, at least 4 hours.
Place remaining 2/3 cup chocolate pieces around edge of filling just before serving. serve cold; cover and refrigerate left over pie.