Very stylish, love it!
I can kinda see what they mean about not enough though (although filling it with random details/toris isnt so good idea), plain gradients look a little dodgey. Perhaps add some scan lines to the background?
Also probably darken the background a bit, it looks kinda washed out at the top :3
Good work on the abstract shape, looks pretty epic. Love that kind of shading/outlining style