Coins seem like such an odd thing to single out. If you're making a gen 2 legendary, you have many more difficult and expensive things to do than this. I don't have the Mystic Coins that I need to finish Astralaria yet, but I'm dreading them far less than something like the Gift of Battle that forces me to grind content that I don't play, don't enjoy, and that I'm probably not very good at. But every time I get 1.2 gold or so from any type of play, I'm one Mystic Coin closer. I don't claim to know if the current price is the "right" price for Mystic Coins, but I would not prefer the days when they were worthless. The last thing this game needs is another oversupplied crafting material with no value that no one cares about. Imo, they serve their purpose well at around 1 gold.