Key TakeawaysBrian Niccol this week took over as Starbucks' new chief executive officer after holding the same role at Chipotle Mexican Grill.In an open letter to employees and customers, Niccol said the coffee chain needs to get "back to Starbucks."Niccol said Starbucks locations need to be more welcoming, with a clearer distinction between "to-go" and in-person service. New Starbucks (SBUX) Chief Executive Officer (CEO) Brian Niccol has laid out a plan for his first 100 days on the job, with an emphasis o ...