I must say, the Decks feature is barely MVP (Minimum Viable Product). The use cases it supports are extremely limited and narrow. Take a game like Gloomhaven, which is very card based. With COVID, we're having to find a solution to play. Card and Deck management make porting the game practically impossible. 1) Looking at your hand to find the cards you want to play is unusable. You have to scroll through a small interface above your avatar clicking on each one to have a closer look. The time it takes going between cards, especially if you want to compare cards, is quite tedious. The slight workaround is to place the cards onto the table and examine them there, but that requires table space for up to 4 players that is non-deterministic as some players have different hand sizes and each hand changes over the state of the game. 2) Deck management is non-existent for players and tedious for the GM. A player must tell the GM what cards they want at the beginning of the scenario. So too with when they level and add new cards. They will need the GM to modify their ability deck. So too with attack modifier decks, which become very complex with bless and curse, again, requiring the GM to modify decks on the fly. To mitigate, we must use table space to place all cards into and the play manually segments cards into their own "piles". 3) Shuffling is, again, only a GM capability. So if a player wants to short rest, they must send all of the cards they want to the deck discard (by deleting them on the table, which is massively unintuitive itself). The recall feature cannot be used as the only way to have Active and Lost cards are on the table. Then the GM has to shuffle the deck, pull one card, then "deal" the remaining back to the player. Then finally, once the player gets their cards back, they are in a different order and they must order them again, without any automatic lexicographic sort ability. Manual based upon tiny images. 4) The deck on-table display is tiny and fixed. There's a constant shuffle button on decks that have no cards in them. The text display is on mouse over only. The functions are bolted on without any context menu support. If you have multiple decks (4 player Attack Modifier decks, 1 monster Attack Modifier deck, multiple Monster ability decks, 4 player Ability decks) it's nearly impossible to function and not accidentally make a mistake. And mistakes are non-trivial to correct as undo does not work. 5) Ownership is either everyone or just the GM. You can place ownership on a card if you treat it like a token, but that gets removed whenever it is placed into a hand or back into the "deck". 6) You can Zoom view a card in your hand or when it is played to the top of the deck. But not on the table. Two different user flows. One requires clicking, the other zooming (which zooming has never been one of the table's strong suits as the zoom is linear, but zooming is inherently exponential). Some of the good things have been play card face down and the ability to treat the card as either a drawing or token. By treating it as a token, it snaps to the grid and makes pilling much more intuitive. The hex map and all of the token management is awesome (though I would love to have a more intuitive numbering system for each monster). If I boil this down, most of the Deck systems are shallow, not providing a lot of functionality beyond barely basic systems. There are some workarounds, but typically put the entire onus upon the GM, even for many player related tasks. I know there is always a cost and prioritization to development, but the Deck system feels like a barely functional solution that has seen no love in many, many years.
