Shoe retailer DSW (NYSE: DSW) has been far from immune from the funk that has shaken the brick-and-mortar retail industry, and longtime shareholders have suffered dramatic losses during the footwear and accessories seller’s period of weakness. Coming into Tuesday’s fourth-quarter financial report, DSW investors wanted to see modest gains on the top and bottom line, and the company was able to deliver on part of that promise. Yet revenue concerns still persist, and many wonder whether DSW can keep making more from less.