The ability to create text cards on the fly would be really useful for tracking conditions or modifiers that crop up during play. That way instead of uploading an image when creating a card you could just type "-3 to move for 30 minutes" and add it to a deck. I think this might have been already suggested but I couldn't find it with a search. Screen real estate in Roll20 is precious. What I would love to see is the Decks selection window turned into something more like the GM's Page Toolbar. You would click on the "Decks" icon and the "Decks" toolbar would drop down with all the available decks.. There would be a check-box to allow multiple decks to show (only one by default) and each deck would have a check-box or button under it to reveal it for that player. If the multiple decks option is not checked, then each time a player clicks to show a deck, the previous one is hidden on the tabletop. If the multiple decks option is checked, then each deck selected will show on the tabletop . GM's could also have settings to control who can see what decks in their "Deck"s toolbar instead of all decks being available to all players.