The intention is clear, if you put Westbrook at the 1 its a ridiculously big and physical lineup in LA. Other teams won't be able to matchup.
Other then that, Westbrook is limited offensively these days. He doesn't have a jumper, is suspect from 3 and had an abysmal year from the FT line. His 100% go motor creates havoc in transition for opposing defenses but also creates some really boneheaded, unforced turnovers. His game is 100% more hustle then you.
Russ gonna Russ is the best explanation. Off the court he might be a positive. He's all about the game and putting in the hard work. Lebron seems to like him and his game.