Hearthstone Suggestion: Alternate Option to acquire Hearthstone Cards

With the year of the Mammoth increasing the number of full size expansions to 3 the cost of the game increased substantially for people like me that like to collect every card in each expansion. Now, don't get me wrong more cards are healthier for the meta (hopefully) and I like this change but at what cost. I suggest the following option for complete expansion acquisition:

• Buy a complete expansion with money for X amount say $130. You get 2 non-golden copies of each non-legendary card and 1 non-golden copy of each legendary card in the expansion. To prevent abuse with disenchantment rates all expansions obtained in this manner cannot be disenchanted (Soulbound) ever.

F2P people will still buy $0-$100 worth of packs per expansion and those that want golden collections can still buy packs to get them. Buying 2-3 expansions in this manner every year ( annual money spent >= $260) seems pretty fair to play a game like Hearthstone however I'd like.

What are you're thoughts on this? Would you buy expansion in this manner? Hopefully Blizzard looks at this or similar options for people that like collecting all cards and/or just want every archetype and deck at their disposal without spending upwards of $500 and more annually.

TL;DR - Buy complete expansions for X amount say $130. Cards bought in this manner are non-golden and un-disenchantable (Soulbound).