This thread has boiled down to what I was afraid of. Badly written, poorly thought-out and misinformed OP means any chance of decent conversations goes out the window. Whenever threads discuss money/cost issues, it comes down to small children bickering about whether or not Hearthstone is expensive.
I believe it's OP's desire to hear the dust-system is bad, but I believe it's not. As with all games that run a big amount of collection-based aspects, it takes either money or time to actually 'collect'. If someone is F2P, then that's fine, but you cannot expect to have the same collection as people who pay for the game in terms of pre-orders and adventures. Likewise, the paying folks need to realize not everyone has the same financial freedom or time on their hands. Anyone's standard is not everyone else's standard.
But Hearthstone is a product. And a product, you can either buy or not. You can afford it, or you can't. You can see its value, or you can't. But an inability to stand behind one of these three measurements, does not, ever, mean that the producer has to change its own perception of its product's value.
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Since HS started releasing 3 expansions a year and did away with Adventures the game has certainly become more expensive. Also, there was a time where every class got one legendary per expansion - now it's two so more legendaries to craft. A good chunk of them find their way into the top decks of a particular meta.
Gvg for example had 20 legendaries and WotOG had 21. Uldum has 23, same for RoS. Two extra legendaries makes a difference for those on a tight budget or F2P. TgT also had 20 legendaries but interestingly enough, it was the first expansion to have two legendaries in one class - Hunter with Acidmaw and Dreadscale.
While the dust cost of cards hasn't changed, players certainly need to invest more time / money just to keep up. No more Adventures means no more getting every single card in one swoop for relatively little money / gold. The rewards do add up and you can get about 6-8k gold if you save up and complete all your quests between expansions but it's nowhere near enough.
I get the frustration. Ultimately it's a choice. You can choose to spend money or invest a lot of time in the game to keep up with the meta. If neither of those is an option then the other option is to stop playing if only having one or two decent decks bothers you so much.