You can't be the MVP if the 2nd best player isn't too far off from you.
LeBron was MVP last yr because Wade wasn't nearly having the dominant and stud type of season that Westbrook is having now as the second option to Durant.
It's like in 2001. They didn't give the MVP to Shaq (28.7 PPG) because Kobe was right behind him on that team at (28.5 PPG) as he made a 6.0 PPG jump from the previous season and was in the conversation as top 2 or 3 best player in the league.
So the NBA decided to give it to a guy who was #1 seed in the Weak East, leading the league in scoring at an inefficient rate and a guy who was doing everything by himself in Allen Iverson.