PepsiCo's (PEP) crown jewel isn't as bright as it used to be. RBC Capital analyst Nik Modi recently wrote in a note to clients that the company's biggest challenge is its Frito-Lay snacks division — not bottling or cost cuts. "Frito-Lay has 3 main issues: 1) price points, 2) under indexed to growing parts of the snacking wheel and 3) lack of exposure to protein," Modi wrote. "Fixing these issues will take time, capital and or reinvestments that could dilute EPS and/or returns." Year to date, Pepsi stock ...