Well since all cards get downgraded if you have any upped cards in your deck, for PVP 1 surely there should the same system with PVP 2 where it upgrades every card you have in your deck, and if not there should be a PVP 3 where it does, so that other players still get the experience of making their way up, so to speak in PVP 2.
Please discuss what you think about this.