Another interesting idea (IMO) would be the implementation of different color HUD if you are in a different team (blue team, and purple team) also would be nice if this changed with the colorblind mode.
So the thing would stay like, blue(current one) for the blue team and purple looking for the purple team, and so on with the colorblind mode, like what they did on Starcraft, Warcraft, and so on... for the different races.
I hope I am clear enough, I may do a little quick edit to give out a picture and give a better idea of what I am talking about.