Could be cool idea to introduce new special types of blood items/effects (f.ex) such as rainbow, feathers, confetti, anti-gravity blood. Blood items that do not look like colored goo when you get hit but are more "interesting" looking, maybe having even a different effect compared from the rest. (anti gravity could float mid air for instance or float upward instead).

I think I suggested this years ago too, but I do not really remember why it was not possible to be realized, but well.. another thing that might be interesting is the animated .gif head texture. So people could create a glare effect on the eyes of their character, or blinking, smiling and such and much more.