I'm Distinguished Master Guardian and I NEVER open the scoreboard to see where the enemies are. You don't actually need to. Not because your teammates actually call out by that rank, but because it doesn't matter where the enemies are until you're there. Anything you need to worry about is usually in your area. I'll exclude a few times where I'm waiting on a site and watching the entire map to see what's going on, but I don't actively use it.
( that and you get better gamesense and you'll just sortof guess where they are and it's trial and error until you find the right spot )
Also maybe this is because I rely on close quarters and sound way more than anything else in the game