A lot of ttrpgs that used card-based mechanics are difficult to implement effectively in roll20. As well, better deck management resources would allow for expanding board game play into roll20. Some deck management features I'd really love to see as options within roll20 : Place-able decks. Much like how you can place token of a roll-able table of images onto a page the ability place an instance of a deck onto a specific page rather than it just being confined to the scroll-able decks sidebar. Having then the option to draw and play cards on that page. Maybe with an option to turn off drawing cards into player hands or have an option to have cards drawn from it persist over multiple pages or just when the players are on that page. Drag-and-drop cards to character sheets. In a similar way to how you can drag some compendium items and what not on to character sheets, an ability to draw cards to sheets and from sheets to place/play on pages. Better hand options. More refined option for passing cards or entire hands, showing cards in your hands to others, being able to draw/take random cards. Being able to easily discard entire hands or draw up to a certain amount of cards from a deck into your hand. Improved deck functionality. More deck specific controls. Being able to restrict them to certain players or have them viewable by certain players. Being able to set decks as 'token piles' or the like where when they are played it shows a brief animation or the like then they automatically go to the discard pile or back into the deck. The ability to look at the top or bottom card in a deck. The ability to place cards into position in a deck, like the 3rd card down, etc.
