Blizzard Stop with power Creep. It makes the game NOT FUN. Instead of Finding 101 ways of ending a game in 5 turns. Start coming up with more nuanced ways of expressing each classes specialty instead of just giving everyone a giant face cannon.
I would suggest new hero powers within the classes that are dictated by portrait.
Example: Priest currently heals two to any target with base portrait. Perhaps another portrait would enable heal 1 to all friendly minions while taking face damage for each amount of healing done. Or, heal a character for 1 health and self for 1 with a different portrait.
Allowing for more complexity within the scope of the class would be much for fun than just vomiting face dam cards.