So people like me who have bought every expansion, what are your plans for your 'obsolete' cards?
Wild seems like it will be a joke, almost like a tavern brawl. And I don't want to ever see a secret paladin again. So I'm thinking I'll just dust all my naxx and gvg cards.
Given that, by my math, it seems like if you DE the old content and hoard gold, then once you have a reasonably complete classic collection you pretty much can "keep up" just by dailies, I will likely be dusting my old stuff.
Over the ~18ish months I've played, I spent about $100-120, and that has me at a complete enough collection I can play any of the 'meta' decks and some of the off-the wall ones too. Not every card but 'enough'. Now it seems that if I DE, I pretty much can play the game in the same way indefinitely, without spending more money, as long as I'm willing to commit to standard and DE my old stuff.
I have spent little gold since TGT (other than purchasing LoE wings) A few extra TGT packs for the first few weeks, then I was hoarding for the inevitable adventure (which turned out to be LoE.) Well, I had well over 3500g by then, and now well over 7k awaiting the new set. So I can buy quite a few packs of the neq set from gold. DEing the old sets will net a pretty big pile of dust (9k ish) to go with my already healthy reserve (after DEing the gold cards from rank 5 chest end of this month, should be just under 4k).
That's a lot. Certainly enough that I won't have to spend money on Hearthstone in the foreseeable future and still maintain a complete enough collection to play the decks I find fun. I think they got standard in a pretty good place from this standpoint. You pretty much need some up front cost to get into it (or an enormous time investment F2P, like 12-24 months,) but once you're "caught up" you can stay at that level without spending anything... as long as you're willing to commit to standard by DEing what shifts out of standard and into wild.