Context
Hebrews 1:1-2 should be read within the flow of its chapter and the larger argument of Hebrews.
Common Interpretations
The many ways God spoke — including through the Malak Yahweh — are now complete. In these last days He has spoken through His Son, who has come in flesh, died, risen, and ascended. The temporary appearances of the pre-incarnate Son gave way to the permanent reality of the Incarnate Son.
Current Position
No defined position is stated here yet beyond the common interpretations above. As related study develops, this section will be updated where the text warrants a clearer conclusion.