Changing up the menu and improving the ordering process may not be enough to turn things around for Starbucks.Starbucks (SBUX -0.07%) is in the middle of a significant turnaround effort. The business has been struggling to grow its sales in recent quarters, and that has created worry among investors. The situation has been concerning enough that the company has brought on a new CEO, Brian Niccol, who is looking to get Starbucks back on the right path.While the stock surged earlier this year on news that Nic ...