Mug Root Beer has been around for many years now and has been fairly successful with Root Beer drinkers. Now PepsiCo has decided that they will change up the formula. They're going to add in a new flavour/sweetness enhancer and reduce the actual sweetener used in the beverage. Why the decision to change something that has been working for years? Corporate shenanigans, most likely. Mug is a perfectly decent massed produced Root Beer and doesn't need any "improvements". If they really wanted to improve on it they could switch over to Sugar as their sweetener and put out some nice glass bottle editions of it. That would be an improvement. This does not bode well for Mug fans, I am thinking.