Still don't love a nickname, and especially not Firebirds, for the MLS Atlanta name and brand, but this concept is gorgeous.
Designer Carlos Sanchez put in a lot of great work into this. The kits and jerseys are clean and representative of the brand he created, although using the Nike template in an adidas league is a bit perplexing. He does admit to preferring the swoosh over the three stripes.
All in all, I would be completely happy with this brand.