Hamlet, I Presume

I expect Hamlet to include elements of comedy, given the participation of a comical actor (Robin Williams), as well as of psychology, and metaphysics. The mirrors mentioned in the introduction serve as a metaphorical device, as do many of the objects and events in the play. I expect the longest of Shakespeare's works to be different from the others in the sense of social and political criticisms. Why did Shakespeare require so much text to send his message? Is it conveyed as efficiently as possible, or did Shakespeare elongate the work to make a point?