Atm playing such games is just too painful. Even in games where cards is just a complimentary element to the actual gameplay, managing discards is a tedious task. It would be nice to have a separate dynamically created "Discard zones" you can set for each deck, and a hotkey which would send all selected cards on the table to their respective discard zones. Also, when right clicking this zone it should provide option "Send all discards back to the deck" (there is no need for hotkey for this operation, I suppose)