Meyendorff continues his East versus West description:

And as Athanasius of Alexandria has shown in his polemics against Arianism, God alone is able to vanquish death, because He ‘alone has immortality’ (1 Tim 6.16).  Just as original sin did not consist in an inherited guilt, so redemption was not primarily a justification, but a victory over death.  (p. 160)

It’s not that the East doesn’t care about forgiveness or justification; it’s just that this is not ‘primary’. The problem from Adam is not that ‘in him’ we sinned (as the Latin had Rom 5.12), but ‘because’ of Adam death entered the world through sin.