-Drop panel or anything the Shows the Lingering Effect like Artifact Lancea
-Put any visually visible Indicator for graveyard effects
(I know that their an Indicator the White Outline, just a suggestion)
-For the Duplication on card: Maybe the scroll wheel?
-Separate AI Match from the online and Decks from the Card Database, Its quite Tiresome for us to open a Deck just to find one card.
Well, Everything Here is just a Suggestions.