The shades make more sense than the mask. Ollie isn't super-powered, he relies on that green gas crap and technology to be Green Arrow, so having shades that analyse his surrounding environments (and I presume allow him to communicate with Watchtower) is better than having a fabric/plastic mask.Honestly I would just be happy if the only change to Ollie's costume was replacing the shades with his true mask similar to the comic.