Nationwide have not said their CREDIT card is changing - only their DEBIT, which works with their Flex Account.
Trouble is there is no other DEBIT card that compares with Nationwide at the moment - all the others charge even more commission and fees than Nationwide proposes to. The other commission free (so called) competitors are all CREDIT cards, so if you use them to draw cash you are borrowing money. This may just cost in in one or two cases, but personally, after studying the figures I have decided to stay with Nationwide. Their exchange rate will be 2% worse than now, but even if you check the rates of pre paid cards they are no better.
The £1 flat rate fee for ATM withdrawals will only amount to a few pounds per holiday - how often do you draw cash?
Their credit card remains a commision free bargain if used only for purchases (until they decide to change that!)