I think it would make the deck builder much better if you had different options to sort your cards, for example converted mana cost or colour. this can really help you smoothing your courve and choosing which mana to put in a multi coloured deck. a great way of visualizing it would be by having piles, like in the deck builder on mtgo, when you tilt your iphone
That would look even better on the iPad, yes. My plans at the moment are to add manual drag and drop ordering in edit mode.