L: very minimalistic... I'd suggest more, and work on depth, lighting, and space issues.
For depth, try using multiple layers of splatters. Also, having some splatters visibly over the focal, and some visibly under it, will work wonders for subtly adding depth. For example, this tag utilizes both ideas of adding depth:
Lighting in a splatter tag may be difficult, but this isn't solely a splatter tag. Use the c4d to your advantage. Burn the darker area on the right, dodge the left, and up the contrast. Try to distinguish where the lighting is on your focal, where the source should be located, and work from there.
For space, try filling the void with something simple, that won't draw away the viewer's eye but will still make a point. Texture is always good. Using a rust, crack, star, or grime texture here would be my personal preference, but you could use anything. Maybe try to find some kind of spider web texture? It may be a bit cliche, but it'll work. In the tag below, I used a c4d and a custom dot pattern as texture:
ANYWAY, on to my tag: