When he went to miami, he basically switched to almost 100% relying on his athleticism and slashing ability to get to the rim. He picked up Wade's penchant for flopping and using his elbow and shoulder to push his defenders away, rather than creating separation through posting up and ballhandling.
He really regressed offensively if you ask me. Lost his jumper and completely abandoned the notion of having a well rounded game.
LeBron in Miami was the most efficient LeBron ever