Just for the record, Micaiah's outfit is the Dark Mage outfit for Awakening. Micaiah is a Dark Mage because, as all the magics are thrown into the same skill, there is no light mage, and thus Dark mage is the closest. She's wearing the actual Dark Mage outfit.
Granted, there are some odd things about the picture (for instance, her head is larger than her chest), but that seems to be the direction they're headed in with the artwork. It's not my preferred style, but I don't hugely mind it either.
I actually prefer it to the way they went with the remakes. Only a few characters had art for them, and they looked kind of odd. What on earth she's doing here, for instance, is quite hard to grasp: http://images4.wikia.nocookie.net/__cb20100919013543/fireemblem/images/thumb/0/0f/Catria_NM_Background.png/737px-Catria_NM_Background.png
For the game as a whole, the artwork is great. There's artwork for all the characters again, and it's of a far higher quality than it was in the SNES and GBA installments, and probably the Tellius ones too.