I actually like the wing a lot. Gives it a very "Americans Le Mans series" look. Especially so with the ground effects.
I think if they set it a little bit lower, hung it off the back of the trunk a little bit more, and curved the ends down slightly over the sides, it would look awesome.
I know I'm in the minority with the wing, but It does look 100% better than the factory high wing spoiler they released.