[Suhiir]

Not a bad idea.
Since WWII the basic USMC Platoon has been 43 men, 3x13-man squads + a command section of 4 (Co, Plt Sgt, Plt Guide, Corpsman) plus some basically standard attachments from the company weapons platoon (2xMMG, 1xAT) for another 8 men.
The problem (of course) is vehicle carry capacity and the support weapons wouldn't get the "correct" unit class if they and the command section were combined into a 12-man "squad".
The other issue is what I refer to as "ants".
Lot's of small units in the TO. I know that while the AI could care less if a company has 9x13-man squads and 16x3 to 4-man teams players find them annoying.
Also you run into the problem of the 500 unit limit if you try to field say a mechanized regiment.
Ahh the joys of OOB work !
My solution has been to create two parallel OOB's. One with "ants" and one without. And putting one set in formations the AI doesn't see on it's picklists. A bit unwieldy at times but probably the best compromise.
What generally happens now with scenarios involving the USMC is the "ants" get ignored by the scenario designer/AI and the rifle company looses most, or all, of it's support weapons, half (or more) of it's firepower. Not a problem for the "Tank Heads", but they should probably play the with the US Army rather then the USMC anyway. The USMC IS basically an infantry force after all.

P.S.
Yeah we've had squad radios (AN/PRC 68's) since Gulf I.