Brian Niccol laid out his plan to fix the struggling brand.After officially taking the helm at Starbucks (SBUX -0.71%) earlier this month, new CEO Brian Niccol laid out his plans to help turn around the struggling coffee shop operator in an open letter to customers, employees, and shareholders.Nothing Niccol laid out was particularly groundbreaking, but it is the plan's simplicity that I predict will help Starbucks get back on track and help boost its stock over the long run.Back to its rootsIn his open let ...