Shakespeare employs anaphora (a word repeated at the beginning of a sentence) to show the overwhelming nature of tyranny they are now subject to:
"New widows howl, new orphans cry, new sorrows strike" creates a claustrophobic impression of suffering.
There is a fragmented trust between Malcolm and Macduff which depicts the repercussions of Macbeth's tyranny.
It seems Scotland has become rife with suspicion.
Macduff and Malcolm's dialogue establishes what it means to be an honorable king, highlighting the disparity between this expectation and Macbeth's reality.
Malcolm communicates the ideal of kingship through his admiration for the King of England, Edward the confessor.
He pays hommage to his godlike "healing benediction" which reinforces the notion of the Divine right of kings and narrows the distance between God and the monarchy.