I love Sheetz, but your coffee does not compare to Starbucks or even Wawa. I think that better quality coffee and espresso would make a huge difference. In addition, I agree with lots of other comments about self serve creamer and condiments.
Let me add flavor shots to my Chai thru the kiosk, and more importantly, let me add a shot of Espresso to make it dirty
I recently traveled to Italy and fell in love with Italian cappuccino. I have always thought that Sheetz could compete better if it offered better espresso drinks. Please consider researching illy coffee, which is THE brand in Italy. I think it might even make you a serious contender with Starbucks.