I will just collate here a few deck related feature requests that I have (but feel free to argue me out of them or add your own):
1) add a command key and a customizable/wipeable field (currently fixed at "Face up") to flip the entire deck face up or down (already posted in a separate thread and added to the bug tracker) ;
2) often decks are used as containers of pieces which are not really cards, and the term "card" might confuse players, thus it would be nice to be able to customize the "Draw multiple cards" and "Draw specific cards" texts (or at least to be able to replace the word "card" with something else, like "piece", "token" or anything one wishes to use);
3) the Mouse-over Stack Viewer can be currently checked to include the top piece in a Deck, it would be nice to be able to only include the top piece in face up decks, excluding instead face down decks in the same map;
4) when a global hotkey invokes deck commands (like flip, reverse, send to another deck etc) allow suppression of the corresponding report messages to screen, even if the request for suppression is actually coming from a GKC which is running the global hotkey and not the global hotkey itself.