The problem with that, of course, is when playing something like Blood Angels. Are both your allies and enemies red? If you recolor your own team, you won't feel much like you're in a Blood Angel squad. Color-coding the minimap by allies/enemies is fine since otherwise it'd be really unclear what red is. (Blood Angels? Evil Sunz? Word Bearers?)
I believe that the faction would be the same color, rather than memorizing the colors for 20 sub factions.
Why not just have a option in the settings to change the color? Similar to the options they have in Planetside 2, just have the default colors as, blue for space marines, red for Chaos, green for orkz, and white for eldar and allow the user to change the colors if they want to.
But the issue remains that they still bear the color on their armor. So, maybe to counter this, we have the enemies highlighted and faded out as a red sort of coating on them that can be toggled on and off. Like I said before previously, I end up team killing whenever I switch my factions, and I feel awful about it. So whenever you see an enemy player, their character is highlighted in a similar fashion as this, except I was too stupid to include names And I also misspelled Sergeant . Boy do I feel like a moron...
I like where this image leads. I would prefer that enemies themselves don't get highlighted, but after a sweet spot between 1-3 seconds, your helmet can give you information displayed in the image. Keeping the text above the target would not give too much away from the position of players that are partially visible and would not obscure units juxtaposed to the target. My full idea drawn from the image would be to give a floating caption that depicts the target's faction in a single word unique to the player's current faction. "Brother/Chaos/Greenskin/Eldar" "Loyalist/Brother/Greenskin/Eldar" "Umie/Spikey/Boyz/Skinnies" "Loyalist/Chaos/Greenskin/ (I'm at a loss for how Eldar refer to their own kin)"
I was thinking of that as something you can turn on and off. Also I too share that vision, and I used the intro for Dark crusade as an example in one of these threads (can't remember which one). View: http://www.youtube.com/watch?v=nodA5bxueyo