Now that Birmingham’s only Fortune 500 company has returned to profitability, analysts have said Regions Financial Corp. needs to focus on revenue growth as it moves forward. And last week, I shared a few elements of Regions (NYSE: RF) CEO Grayson Hall’s strategy for growing the bank’s balance sheet. Hall said at the recent Goldman Sachs Financial Services Conference that a key to Regions’ growth plan is its enhanced approach to serving customers through a program called Regions 360. But…