I'm happy to see Kripp speaking out on behalf of the free (and low investment) players lamenting the importance placed on legendary and epic cards with the release of Journey To Un'Goro. I agree that even the Hall of Fame bonus dust is unlikely to be enough for the majority of players, and perhaps doling out a random quest to everyone that logged in might've helped alleviate the problem somewhat.
However, I feel there's another issue concerning quest cards that's not getting nearly enough attention due to the above complaints, and it's perhaps part of that problem as well as an overall design issue.