I understand where you are coming from but I would say, be vocal to your teammates on the items you DO have. So many people are just not vocal and it shows in their rank and overall gameplay. Being vocal is part of every game, even casual play but just because they are not vocal on the items you need, you should express on what you have.... ALSO, you can now check what ammo a person has when you hit your inventory button. You know exactly what backpack they have, the type of ammo they have, as well as their Armor. This adds another level of play that not many people are aware of.
This may be a slight skill-gap to some people who has difficulty of keeping track of their teammates, but I absolutely don't want to dumb this game down any further than it needs to be.