So this is similar to my suggestion for the Russians, which a dev graciously took on
I noticed all US riflemen have EOtech sights. You guys already have an ACOG model, so I think riflemen should be split into Rifleman (EOtech) and Rifleman (ACOG), Even better, throw the aimpoint red dot sight in there (probably more realistic than the EOtech,). For variety if nothing else (although it would be more realistic also).
Also, the EOTech sights do not match the rifles colorwise. They are a tan/desert color on the black rifles and it stands out a lot. In the arsenal, you do have the matching black EOtech.
One more note regarding loadouts. The US Army team leader IIRC (or maybe squad leader) has some weird night sight/thermal sight on his rifle. I just find it a bit of an odd and extremely situational addon, especially for a team leader.
I realize many of these may be legacy material from arma 2, but I see no reason why you cant do some rearranging!