Direct Answer
David’s key contrast is that in Christus Victor the “punisher” is Satan and the enemies are Satan, death, and Hades, while penal substitution makes the Father the one pouring out punishment; that shift changes the emotional center of the cross from appeasing God to Christ’s victory and rescue. The transcript suggests this could lead preaching and worship to emphasize liberation and God’s benevolence, while still affirming substitution, sacrifice, and cleansing by blood.