King Lear: The judgement of the Heavens?

• Gloucester's quiet death: joy and grief; "ripeness is all" (5.2.11).
• "We two alone will sing like birds i' the cage" (5.2.9)
• Shakespeare radically changes his sources in the ending -- Edmund's orders (5.2.26ff).
• The deaths of the sisters: black comedy? (5.3.76ff)
• The duel and Edmund's repentance (?) (5.3.247-8).
• Edgar (5.3.173-6) and Albany (5.3.235) find justice in the deaths of Gloucester and the sisters.
• Lear brings in Cordelia: justice? (5.3.265)
• "Look there, Look there" (5.3.313): what does he see at the end?
• The ending: Albany (Quarto) or Edgar (Folio).