I think the disguises are the key. When the true selves are revealed, forgiveness and reconciliation can begin. Metaphorically and literally, there can be no forgiveness until we see each other as we really are and come to accept it.
Reconciliation occurs between Rosalind and Orlando, Rosalind and Duke Senior, Celia and Duke Senior, Phebe and Silvius as disguises are dropped and truth is revealed. Forgiveness occurs between Duke Frederick and Duke Senior and between Frederick and the exiled noblemen as Duke Frederick has an epiphany and seeks refuge in a religious order: "The duke hath put on a religious life."