I never understood why people say they needed the blood patch to see if they where hitting someone. Since day 1 of release it was possible just by seeing the hit animation of the person taking a round. Then later they added the flash to the crosshairs as well.
It's one thing using the blood patch cuz you want a bit more gore...but to say you need it to tell if your scoring hits is just lame.
The only mods I would have been intersted would be something some like the Tribes 1/2 scripts