M113 Armored Personnel Carrier - is in 2 line service, i think
M109 howitzer - is present
Dragon Fire (mortar) - ok
M270 Multiple Launch Rocket System - is too power
MTVR (Medium Tactical Vehicle Replacement) - ok
LAV-25 - we have the strykers
Amphibious Assault Vehicle (AAV) - is pointless
For the infantry I think this:
Combat Engineers (3 or 4 men squad)
engineer - M4
Upgrade:
- M4 Super 90 shotgun
- demolition charges or C4 explosive
Anti-Tank Squad (3 men squad)
2 soldier - M4
1 soldier - FGM-148 Javelin
Riflemen (or Infantry) (5 men squad)
Squad leader - M4 and comunicator
4 Soldier - M16A2
Upgrade (only one at the same time):
- marksman: one member take a M21 and the squad have a power like british sniper;
- grenadier: one member take a M16A2/M203 the squad have a grenade launcher power likes greandes but different;
- heavy gunner: a member of the squad take a M249 SAW* or AT4 the squad have a power likes volksgrenadiers panzefaust
*for this power i think is better a upgrade likes BAR upgrade.
For the aspect i think a light equipment (or a euipment like assault class in BF2): a interceptor body armor with 2/4 pockets a little bag on the back and a M9 bayonet
For the uniform a ACU or Woodland pattern uniform
P.S. I'm a Italian COH fan and so I'm sorry for my english because it isn't my native language and I hope this suggestion will be take in consideration, if it is of your pleasure, I'm will be happy