Maybe this is just me but I think it would be a nice feature if there were check boxes or radio buttons in the manage deck area to show only upgraded or only unupgraded cards. Often, I want to put together a deck of either all upgraded or all unupped cards or all upped cards and it would just be a little easier to sort through if I could look through just my upgraded or just unupgraded cards in each section (including Show All). It is not a big deal but as my card collection builds, anything to sort cards while browsing through them helps. It doesn't seem like it would be too hard to implement but I could be wrong about that.