It's never black and white. Ole is still not a top coach. It's good that most fans want the best for United. This season he has done a lot for him to be given the chance for next season.
Replace him if by December we are not challenging.
His tactics won't improve unless he realizes that he can't be that rigid. Pep wins only because he has the players to be rigid.
I will give you a good example on this. When Ajax and Spurs played their semi final game at Spurs and Ajax won 0-1, the pundits thought Ajax would defend in the home leg. Gullit said no. He said they would play exactly the same way they always play. The British pundits were shocked. They thought Gullit was joking. Gullit said no he is serious. Ajax played the same way and lost.
Ole should learn to adapt his game plans depending on the opposition and the situation.