Photo: Sarah Stier-Getty Making an NBA All-Star team next season could be harder than ever. More than 30 players are capable of averaging 20 points per game, a massive wave of young talent is rapidly climbing the league’s hierarchy, and the stat sheet alone isn't enough to separate one candidate from another. Winning, efficiency, defense and overall impact will all matter in an increasingly over-crowded field. With top-tier superstars occupying most of the available spots if