Coke not tasting like Coke anymore.... Why ?????

Ever since Coca-Cola introduced there original Coke 2L with less sugar it does not taste like Coke anymore. This is not only one bottle I purchased but throughout the Festive Season, I have bought quite a few. It leaves a metallic after taste and does not refresh you like before. I understand the pressure the government has put soft drink vendors in with forcing them to use less sugar or no sugar and to even substitute sugar for another sweetener. Also being forced to buy the less sugar product and not have the choice between either is not doing your company any good. As a consumer of your product for many years, it saddens me to see the overall quality of your product taking such a dramatic drop.

Dissatisfied consumer.