If I had my choice for infantry design I would do the following.
For standard infantry would use whatever the most common rifle that was uses for each country.  For commandos I would use a special weapon such as a submachine-gun, assault rifle or bazooka, panzerfaust.
For poses I would have standard infantry with weapon shouldered and at the fire ready.  With commando I would have their weapons firing from the hip position unless the are using a bazooka or panzerfaust.  Even at the shoulder ready position it will be easy to these weapons apart from the rifle.  I hope there is still time for FMG to take these into consideration.
However, if FMG has already made the molds and they are already in production then it is a moot point.  Considering all the excellent work they have done.  I’m not going to be complaining if the poses or weapons aren’t the way I would like them to be.  The quality of the pieces will be enough for me.