This one isn't a deal breaker for me, but when creating a new deck, I tend to make many small modifications, i.e. a card here and there, many times. It is really helpful to have the text box with the editable decklist at the bottom of the stats page.
However, when I'm looking at a deck that I've saved, it's not there, I have to go to edit deck in the upper corner. It's not too much of a problem, and it kind of makes sense why it's that way, but it would be nice if the box was still there and would just edit and save over the card list. (The title, comments etc. would be fine to leave only under the edit deck pop-up.)
Thanks!
AeroSigma