I agree with julie, and I would add that it needs more contrast and color in the bug. I think one of the things that marks a good bug macro as art, is color. bugs have remarkable colors that need to be exposed otherwise they are bug shots. I know how much effort it takes to get shots like the one you posted, so I appreciate it very much! I also know that 99% of others who are not photographers dont know and mostly wont care, so it's all about the image. I'd try to increase the saturation and contrast in the thorax abdomen and eye areas the maybe drop the green in the background to help isolate the bug. . .