Two ideas, fairly simple to implement, that might make these systems a lot easier to deal with in-game.
1. Change the color of the dot for a player when he/she is downed. As it stands now all dots remain the same light blue color, and it would make it exponentially easier to identify who is downed if theirs turned, say, red.
2. Put a big red cancel (circle with a line through it) sign on someone who’s dead. Maybe it’s just me, but I have a hard time identifying someone who is actually dead because the greyed out color of their portrait isn’t easily recognizable.