During Blitz's with friends, I find myself having to repeat the question of how much money they have, who is who, and if they need help or not (health-wise.) I don't take this as a necessity, but it would be VERY helpful. I would just simply call it the Blitz Buddy Viewer, with the simple input of a command (maybe D-pad Right+A or something), near your money and skills, you would see a tiny menu of the other players' health, amount of money, and gamertag/psn id. And to hide it just press it again. Here is kind of what I have in mind, be prepared of the horrible MS paint skills I have. and the awkward dimensions too.
Sounds like a personal problem. How can you not remeber what 3 other people are playing as? Maybe you should try playing sober?
Hey, how does the tank slam? How does the tank slam? Oh, yeah that is the gunner. Are you a gunner? How does the tank slam?