1. Not enough blending
2. the way it looks now.. the letters are too big.. there isn't a central focus..
3. too much red
4. try adding a light source and maintain that source of light throughout the sig, adding shading where necessary (also goes with the focus theme)
5. 'less is more' ..
6. try using the 'Gaussian Blur', then deleting areas of focus
7. try using multiple 'Gradients' to achieve color, different hints of color, so no one color is too overwhelming ..
8. a complete 4-sided border would look more complete on this design ..