This is perhaps one of Shakespeare's more interesting plays, if you will. In comparison to Macbeth it isn't quite the walk in the park.
I think conceptually it enables the reader to see that characters can influence characters to such a degree that the original traits are masked and changed. Tragedy in this play is definitely a main component - and a great emphasis that perhaps the villain doesn't always find their true defeat. In a way, wasn't the "villain" successful? He lied to everyone and pretty much killed whomever got in his way.
The Beowulf poet is a "master of the aristocratic oral tradition" ( Niles 1993 : 104). His work just stands out as a complex counter to the politically shaped narratives emerging in the ninth century and continuing down virtually to the end of the Anglo-Saxon period. But Beowulf does not simply stand in monumental exception. We can further suppose, along with Kirsten Hastrup ( 1990 : 6), that later writers may use old material in a spirit of corporate inclusiveness. They may, that is, assert a kind of sameness between present and past -- an assertion opposing the idea that an Anglo-Saxon poet would necessarily distance himself radically in his Anglo-Saxon present from the heroic past to which he gestures. For Beowulf this would mean that the poet of course knows the past is both past and different in some respects from his present. Yet his story provides a myth embodying both heroic values and a complex vision of worldly affairs. That myth, the poet's means of forming an image of himself and his present to himself and his peers, would have been taken up in subsequent versions of the poem and in the same ways.
For those who study the great art of lying in bed there is one emphatic caution to be added. Even for those who can do their work in bed (like journalists), still more for those whose work cannot be done in bed (as, for example, the professional harpooners of whales), it is obvious that the indulgence must be very occasional. But that is not the caution I mean. The caution is this: if you do lie in bed, be sure you do it without any reason or justification at all. I do not speak, of course, of the seriously sick. But if a healthy man lies in bed, let him do it without a rag of excuse; then he will get up a healthy man. If he does it for some secondary hygienic reason, if he has some scientific explanation, he may get up a hypochondriac.