Lakers get a pretty good shooter and defender in Robert Covington. Covington is a better fit around Westbrook and LeBron than THT is.
Portland gets a drive and kick guy in THT, a good fit around Lillard. THT has a lot of upside as well, he is just playing on a team where he is asked to do something different than his skill set because both LeBron and Westbrook do this better than him. They take Jorden's contract to make the salary work, no big deal because it expires after this season.