Your way of thinking is correct. The only mistake that i believe you are making is assuming that the game has become more expensive.
Sorry but no. You are wrong, the game has become more expensive. You talking about duplicate protection but you are forgetting there is one more class we have now and there are more class legendaries. Please change the point of view.
Blizzard gives something. that is true but they are calculating the minimum for keeping F2P barely alive. BTW I'm not in a bad situation, I play wild and don't need much of the new cards, and not talking this and writing this because I desperately need gold, I'm talking because I feel betrayed. If in-game card trading and selling were possible, I wouldn't think for a minute to sell my collection at this point.