Please Blizzard, make a “Replace with Golden”-button so that you can easily replace your cards in a premade deck with new golden versions that you have aquired.
It would be much easier than to go through you entire collection to see which cards you now has as golden and then manually replace the non-golden.
Delete and remake wit deckcode and it puts all golden in there dont take much effort to be honest.
Now they have much more serious things to think about! trust me!
From the title I thought you meant an option to upgrade a card to golden so you save yourself the dust that is the card contructing cost.
So if you want to upgrade a legendary to golden you need to pay only 1600 dust instead of 3200.
Dude, that would be awesome!