The Pistons improved their roster in several ways by trading for Bojan Bogdanovic. The Pistons made a trade Thursday morning with the Utah Jazz, acquiring Bojan Bogdanovic in exchange for Kelly Olynk and Saben Lee. Let’s grade the trade… Pistons: A No, this is not a biased take. Troy Weaver pulled some magic today getting a 39% career three-point shooter in Bogdanovic. For the Pistons, this trade does three things. First, it opens a lane for rookie center Jalen Duren, who now has an easier path to playing time with only Nerlens Noel being the other true center. Duren can…