From what I understand from when this was discussed on here ages ago, the old NW
colour scheme cost alot of money to maintain compared to what the new colour scheme will cost, so in the long run they will actually be saving money.
Personally, I think if an airline wants to change it's colour scheme they should get on the net and ask some of the people out there to do it and give them a chance to show what they can do. Some of the schemes I've seen that people have come up with on the net are way way better than what the airlines pay millions of $$$ for to some design company, and they could save some money by offering a small cash sum and maybe free flights for life to the winner.
"She Rolls, 45 knots, 90, 135, nose comes up to 20 degrees, she's airborne - She flies, Concorde Flies"