MMO/RPG cardgame ideas?

Finally cleared all of ToT a day before Battlegrounds beta dropped. Finishing all 4 bosses for each hero just to get an upgraded card is great but whats the point when you finish everything and its just pointless to play anymore? I guess for fun, but it was hard enough to complete it, and having used every treasure atleast once… well now its just boring. Would like to see them add new content to the already existing DRs they have instead of just copy/paste the same idea over and over. They should let you keep your heroes and add content to quest through; kind of like a MMO/RPG cardgame?