It would be great to have a sugar free cappuccino option at the self-serve station. This is an untapped market, and would be very popular amonst diabetics and people who follow a low carb/keto diet. Your blend could be sweetened with Splenda or Stevia and still remain sugar free.
I eat a very low carb diet and it's really difficult to find anything on the menu anymore. Sometimes I'll try something seemingly low carb (like a taco salad w/ no taco bowl) only to find out that rather than meat, there's chilli, probably with a lot of sugar added. Would be great if there were just a few low carb menu offerings.