So, basically, one legendary card for every 20 packs.
But I, on the contrary, felt a bit repulsed by this billion free packs in Hearthstone. It feels like a beggar is clinging to you on the street and shouting: "Hey, pay attention to me! Want some packs? Want me to just stand here like a heron?!" But no offense.
I also felt a bit repulsed by these huge salaries in the West. It feels like liberals in the government are clinging to you on TV and declaring: "Hey, live like a human being! Want to buy an apartment, a car? Not in 100 years with a huge interest rate."
I haven't played ranked much in Hearthstone, but I think the ranking system is better there than in Heroes of Might and Magic, at least you can feel the difference between the ranks, but here I don't see any difference between rank 20 and rank 5, neither in the variety of decks nor in the skill of the opponents.