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See your squad mates status in the bottom right/left of the screen (alive/dead and ammo/hp from 0% to 100%) would help assaults throw ammo medics hp etc.
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Having squad mates with different color "indicators" (the fucking thing that floats above your head to tell people you're a friend, currently light green by default) this would be especially nice if you're playing with more people since we often have trouble knowing who to run to for ammo/hp.
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Grenade indicators, literally just the average small arrow with an icon pointing to a direction of a nearby enough grenade to harm you.
Currently lvl ~129 and these are the only real issues I've ran into I wish would get fixed AT SOME POINT