Maybe it's his style being too "clean and pretty" or maybe it's just the fact that he totally forgot how Batwing's chest logo actually looks. I can understand it being different on the new armor (although hardly - he's a new hero, why suddenly change the logo?), but it's also drawn different on the page where David is standing in front of his old armor. Plus hey, they kept outlines of the old logo in David's narrative boxes! The more I think about it, the more I'm convinced that it's just Marcus To's (and editor's) mistake... and quite a big one.
Besides, To's Batwing is a tiny bit too bulky (just like in JLI)... Or maybe it's the fault of new armor?
When it comes to the action, I quite enjoyed it. Matu was great, as was David. I hope he doesn't get accustomed to Gotham too easily; I want him back in Africa, please!