i'm reading Andrei Agassi's autobio and during the early times of his team up with Brad Gilbert, BG mentioned to him that he should not be a perfectionist and that he should try to exploit the opponent's weakness and not to aim for winners all the time.
having said that, i think BG has a big role in molding Andy's counterpunching game. maybe AM took the advice by heart. hope Lendl finds a way to instill a balanced punching-counterpunching approach to his game.
Andy does need to learn that perfection in tennis, or indeed in most things, simply doesn't exist, and accept that even the very best players make mistakes. No point wasting time agonising about a poor shot and still dwelling on it 10 minutes later. That has often cost Andy dearly. However, I did notice in Brisbane and the AO that he seemed to be acquiring the ability to do what all players should - quietly acknowledge to themselves that they have played a bad shot, then immediately put it to the back of their minds and get on with the match. Plenty of time for analysis later! I'm talking about UEs here, but Andy, in the past, has also been guilty of blaming himself for what he perceives as poor play when he fails to return a good shot by his opponent. Again he should just quietly acknowledge his opponent's skill and get on with his own game.
I must admit Dubai can't come quickly enough so's we can see what the Lendl effect has been thus far.