What worries me most is that this issue seems to be totally ignored.
It's all about 'We Need to get DEC to Peg' and 'We Need to get New Players Into the Game'. However, without the fundamental issue that cards are bound to lose all their value solved, it obviously will never ever work.
The only thing that can (temporarily) save the game in the current state is a totally irrational bull market where everything pumps like crazy again.
I'm not saying by the way that all cards should fully keep their value and go higher. The dropoff in value and utility is just way too extreme right now.
A possible solution the way I see it is to move to a game mode where players pay to play on a fully level playing field (more fun) with packs as rewards and part of the fees going to players who lock cards that are used in this game mode on land. (Article Link)