I like the changes and you're fighters are in a solid jiu jitzu position. Can you try to incorporate the color scheme somehow? White, blue, purple, brown, black, red. Also, please edit the belt on the Z can you make the whole Z look like a black belt with that red stripe exactly where it is now and with a few small white stripes on it? There is a picture of a black belt here:
http://jiujitsufoundation.com/classes/advanced-program/Thanks!