I saw it from close range in my role as sideline reporter through the Finals for ESPN Radio. LeBron essentially calling timeouts and making substitutions. LeBron openly barking at Blatt after decisions he didn't like. LeBron huddling frequently with Lue and so often looking at anyone other than Blatt.
There was LeBron, in one instance I witnessed from right behind the bench, shaking his head vociferously in protest after one play Blatt drew up in the third quarter of Game 5, amounting to the loudest nonverbal scolding you could imagine.
Which forced Blatt, in front of his whole team, to wipe the board clean and draw up something else.