The Pistons got good news Tuesday night. They didn’t win the draft lottery. They didn’t even come close. This was a Powerball drawing in which those who didn’t get the exact six ping-pong balls were the happiest. This is a basketball draft in which the premium selections are deserving of a heartworm examination in relation to recent predecessors. The Pistons are better off remaining in the middle of the lottery. They will select eighth. There are no stars in this lottery, and there might only be a couple of Day 1 starters — Kansas’ Ben McLemore and Indiana’s Victor Oladipo. This is a lottery in which adding rotational depth is the primary objective. “There are no franchise-changers in this draft,” Joe Dumars said Tuesday night. Some might argue that there are no “franchise-changers” in the front office, either. The pressure on Dumars, as president of basketball operations, requires no embellishment. If the Pistons are still in the lottery next year — when a team would dearly love a top-three selection considering the improved talent depth — there probably will be somebody else calling the shots. Although it’s unlikely there are any future stars awaiting the Pistons with the No. 8 selection, they should take a serious look at Indiana center Cody Zeller. He could drop into the Pistons’ laps just as Greg Monroe, Brandon Knight and Andre Drummond did in the previous three drafts, when the team selected in generally the same position. Zeller didn’t work out at last week’s NBA predraft combine in Chicago. But he impressed in the agility drills, reaffirming what many already saw in his two years with the Hoosiers. Zeller runs the floor very, very well for a big man and has a skill set that lends itself to an NBA playing style that emphasizes more “freedom of movement.”