By Ben Pickman The Storm brought back their Big Three. But Indiana … what are you doing? Heading into the WNBA offseason, this year’s free agency class was widely regarded as one of the best in league history. Don’t take my word for it, though, Storm star Breanna Stewart said as much before the New Year. Stewart was just one of the recent free-agent MVPs. Like the others—Aces forward A’ja Wilson, Sun forward Jonquel Jones and Lynx center Slyvia Fowles—however, she elected to return to her team. While there are certainly impact players (paging Tina Charles and Liz Cambage) still unsigned, much …