Like most people, I didn't like the stock faces on Fanstoys Dibots, so I made replacements. I wanted a subtle snarl on Slag and I think it came out well. Swoop though needs more refinement, I think. And yes, I am working on Snarl.
These look a lot better. Slag looks 1000% better than his stock face especially. You should tackle Perceptor (Tesla). I would buy a new face for him in a heartbeat.
I've already done one version of Tesla, but I'm working on a second version and want to see how it comes out before I release pics.