I think it would be cool if we could have a place like the gear and seed valt to store excess treasure cards as its a pain having to sell them all. Also maybe add the option to quick sell tc's as this would speed up the process a lot.
I think this is a great idea it would help my life wizard and my storm wizard so much. I hate having to click one by one when I get mad gold and I don't have any room to buy junk to get rid of gold