Would it be useful to be able to more clearly be able to distinguish cards in the cards menu? Right now all cards have the same design, and also the Maestro/Mastercard logo look almost identical. There are differences in the names and account numbers but these are not clearly legible when you swipe through the list.
I would propose the option to give your cards in the card menu (so not necessarily the real cards) a custom background or color, just like with regular bank accounts (instead of the rainbow background which doesn't tell me anything about the card anyway). Perhaps it would also be useful to be able to change or add a description or name for the card after it's been ordered, and have the description on a more prominent place (such as above the card).