Why for TOR: start a rebuild process with some picks and young talent (Green).
Why for BKN: Simmons doesn't fit well with Claxton and Siakam adds another punch that can help them contend.
Why for DAL: Getting a much needed defensive specialist alongside Luka and Wood, can also operate as a secondary playmaker when Luka sits, his lack of shooting won't hurt as any other rotational player can shoot.