I can see the problem of riflemen having smoke grenades and making mgs much less useful against the US however i don't think simply switching which squads carry them will make gameplay more or less interesting. Making rear echelons designated smoke mules doesn't seem like a very fun fix. Officers and rest echelons aren't a bad choice though.
So the USF need smoke since they don't have snipers like most other factions do. OKW may be a small exception but fortunately the isgs are getting smoke, they have good early vehicles and decent infantry.
????? USF dont have good infantry and light vehicles?!!! WTF. Imagine your smoke was on ur pack howitzer for a second.
They are trying to make it so people stop spamming rifle builds and use rear echelons more often in conjunction with riflemen. ATM USF is the faction that uses the least combined arms why? because they don't have to when riflemen can be equipped to do everything