Problem is as I said above is the flawed CCG's genre, you can't solve the problem from within the system itself
it doesn't take Einstein to work that out. When you sign up to one you take all the shit that goes with it that's why if and when Hearthstone apparently rotates out next month after the
Lifecoach debacle on reddit I for one won't be moving to Gwent, Shadowverse, Faera online or any other free-to-play-pay-to-win-skip-the-grind bullshit, I'm done.
The only way to solve the problem is to move the entire game out of CCG status and start selling expansions as a whole for a reasonable price. Of course that will never happen because of the bulging dollar signs in game makers' eyes.