The Cavs have already made a couple big moves that were kind of one move, bringing in Iman Shumpert, J.R. Smith, and Timofey Mozgov for what basically amounted to picks and Dion Waiters. That's quite a bit of player movement in and of itself, and the Cavs might be content to let the rest of their pieces gel.
Or maybe they think they aren't a finished product. Behind Kevin Love, Mozgov, and Tristan Thompson there is ... not a whole lot. Maybe the Cavs think LeBron James and Shawn Marion can do a decent enough job in stretches at power forward. If they don't or if those guys can't, well, the Cavs could use another big man.
I'm less concerned about the backup point guard position, but it's certainly an area the Cavs could improve. Will Cherry and A.J. Price got shots this year, and Matthew Dellavedova appears to be better as a pseudo shooting guard than running an NBA offense. That's totally fine, but the Cavs might want another primary ball handler. In the playoffs, it'll probably be Kyrie Irving and LeBron running the show at all times.
We will keep you updated here all day. Feel free to chime in on other teams' moves as well.