PvP ranking system, that tracks win/losses. And thus the leaderboard should be on wins. more wins, the higher up u are.
More cards. wich is something that is ALWAYS in production i like to believe, but it simply isnt that easy..
Downgrading, yes i actually voted for downgrading, but i realized theres no purpouse, except for rares, and a rare downgrading option would be nice, where lets say, downgrading GIVES u 500electrum (not that selling an upped cards gives u 1k~) and this, only for rare cards.