It would be nice since Champion Skins cannot be customized or used on any other class, to have unique voice lines representing their chapter which would add more value to the DLC packs. I cannot say for certain how it would be implemented, at first I thought it would be as simple as just changing the speech wheel to reflect the Chapter Champion your playing (kinda how the PVP does it with the Chaos Classes). Then I see the issue, in terms of making new interactions with every other Class and somehow reflecting that onto the world created, it would be very time and resource consuming to re-voice every interaction with every object or entity in the game. But it was just a spitball idea something that I think would add more value to the Champion skins.