Minor item: FAQ says that pricing will be available by end of 2015, which has just passed.
As for product feedback, I've literally never understood the appeal of debit cards over credit cards. I get cash back, delayed payments/free float, better anti-fraud, and better purchase protections with a credit card. So, I wish you the best of luck, but I don't "get it" unless there's a largish market that can't get (or can't handle) credit cards.
Which that said, there's plenty of opportunity as a debit card product. We believe that no financial product right now really prioritizes spend control and bookkeeping accuracy in the way we do within our product.