OKC has too many picks. Consolidating Hartenstein, Dort and Williams, for AD and Exum, would be a massive upgrade. This gives OKC a big four between SGA, AD, Williams and Chet.
Dallas gets Toppin, Hartenstein, Dort and Williams, and two solid FRPs, while moving off of AD. This keeps them competitive while building around Flagg with four younger, cheaper players.
Indiana gets a starting center in Gafford for a back PF.