With the trade deadline and “All-Star Weekend starring Kevin Hart” now in the rearview mirror, the NBA picture has come more into focus. The haves and the have-not-enoughs are clear. One league exec was on the line Tuesday to note his early call was still valid. “There’s no way you can look at the league now and say that Boston, Cleveland and Oklahoma City aren’t on a different level. I told you that almost two months ago,” he said. “The only way anything changes by the end of the season is injuries, but you’ve got to be looking at three of the four conference finals teams here. Those guys have separated themselves.”