Hate that all blue Man City kit...
Man City 14-15:
I had the same impression when seeing the World Cup kits made in one color @ FIFA's recommandations that also came with restrictions regarding how the teams choose in which color they play ( see Spain-Netherlands ), but in the end. I actually liked the Spain kit and it looks more high-class with same-color shorts, the golden stripes also help the shirt look nicer, especially since Adidas always insists with the 3 stripes that always kill a bit of the classy look.
I think it worked just fine, the only notable exception was in the 2nd semifinal when they improvised so both can play with the home kits, The Netherlands used white shorts so Argentina can get the black ones and so both play in the home shirt, else, it should've been Holland Home-Argentina Away.
At first, I thought the directive is a downgrade to kit design, but in the end, if we look closely, there is tendency to make sport related equipment less eye catching and more sophisticated, same for Inter kits, even though not traditional, if you take off the sponsor, it would look like any casual polo shirt.