Thanks a lot for the feedback Dre!
MVM is something I haven't really cared about until the new MVM update because I never play it. I really appreciate all the reports. I can already tell you that the damage flash around the crosshair is already possible and integrated into my HUD. I assume you're talking about fog's crosshairs BTW, as that's the one that has this integration.
I guess I forgot to add the instructions in the readme however, so I'll update it with instructions when I finish here.
Navigate to your scripts folder and open up HudAnimations_tf.txt. The first entry should be DamagedPlayer. There are instructions underneath there.
Thanks again for your bug findings :D