The deck builder is extremely frustrating and fragile because of the restriction that you can only save decks with exactly 60 cards. If you accidentally navigate away, all your work is lost. You should always be able to save decks no matter how many cards they have. In fact, you should be forced to give them a name when you create them and they should be saved automatically every time you make a change.
I tried saving a deck in progress as a package, whatever that means. An alert appeared in the corner saying it saved, but it's not listed in the select package dropdown and the load package button is still grayed out. So I guess it's gone.
