LeBron has been on the gas for 12 weeks now. He's maybe the best player the league has ever seen at the moment- without a doubt, he is worth 40 wins to any team.
I can't think of another player you could plug into a lineup, in 2015, that would wreck shit like leBron is at the moment. They're 14-2 against the WEST since Jan 1st, when LBJ started growth again, (allegedly lol).