Blizzard is taking marks from WotC and MTG about devaluing older cards. Catch-up mechanisms would make the game only focus on the newest cards. The playerbase often feels cheated when their existing collection&#x27;s value decreases and new content is pushed. You find the same feelings with MMO expansions. &quot;My top tier raid gear just got replaced 10 minutes into this new content? Then why did I spend all this time.&quot; While this sentiment may be illogical, game design often touches on player psychology.<p>Also it allows casual players who may take a several month break to return. The top tier decks may change, but a deck that was good a year ago would still be relevant for casual play.<p>The comparison isn&#x27;t exactly fair since MTG cards have a dollar value, but HS cards only have a perceived time-sink value. Also the out right refusal to rebalance existing cards does make the game stagnant. But that feeds back to the casual play argument. If cards were completely rebalanced it would be prohibitive to returning players. I would be interested to see numbers on casual v hardcore players. Reddit has a skewed perspective, and it seems like everyone has a full set. But almost none of the people I know irl that play HS have anything close to a T1 deck, yet they still sink 5-10 hours a week into the game.