Looking great so far , here's some suggestions,
The U.S. Army doesn't use the tan/Coyote Interceptor, at least I haven't seen any pictures of soldiers wearing it in Coyote. Maybe the officers could have it in the ACU pattern. CameronMcDonald already said this, oops.
On the most recent pics you've shown, the rifleman are wearing FLC vests but the texture is only on the back of the body armor.
Maybe you could copy the Camelback from Hyakushiki's airborne units on to these guys.
The ACH/MICH would be more accurate than the PASGT helmet. I understand why you don't want to add it. I don't think it would be too hard to implement. Just copying from Hyakushiki's airborne units. If you did that then maybe you could replace the sun wind dust goggles with Hyakushiki's ESS low profile goggles, to give it a more advanced look. I also think the officers should also get a helmet.
Don't know if any of these appeal to you. Just some things I noticed.