What do people think about act 3, scene 6 of Macbeth?

In act 3, scene 6 of Macbeth, a lord reveals to Lennox that Macduff has fled Scotland for England to rendezvous with other rebels. It is clear that both men sympathize with Macduff, as they now openly believe Macbeth to be a tyrant. Macbeth has also recently added to his growing infamy by killing Banquo and pinning the murder on his son, Fleance. Neither Lennox nor the unnamed lord are in the least bit convinced by the official version of the story; they know full well that Macbeth is wholly responsible for Banquo's death.
Scene 6 adds to the grim sense of foreboding that has been developing over the previous scenes. The reappearance of the witches and the materialization of Banquo's ghost add an appropriately eerie, supernatural quality to Macbeth's increasingly despotic rule. Yet, at the same time, the growing realization of Macbeth's tyranny, and the introduction of the names of the rebels, provide a brief glimmer of hope. In sending his prayers to Macduff at the end of the scene, the lord is expressing the fervent wish that the power of the Almighty will prevail over the dark, demonic forces unleashed by Macbeth's crazed ambitions for power. The stakes really could not be higher. By the end of this scene, we are left in no doubt that a battle between the forces of good and evil is imminent.