Wehrmacht has Flamethrowers, Sniper and Mortar, Soviets have Molotovs, Sniper, Flamethrowers, Satchels and Mortar, OKW has Incendiary Nades and ISG (Doesnt have to deal with Early MGs that much fortunately), UKF has UC and Sniper all the while USF only had Grenades in the early game to rush out and clear garrisons or smoke MGs so why doesnt USF deserve 1 alternative in the early game?
Firstly snipers do not clear units out of buildings well, unlike in VCoH.
Secondly variety is not the issue in coutnering MGs. MG counters are available on American mainline infantry that scales towards the endgame.
In my opinion, smoke on all mainline units is barely acceptable, let alone an extra mortar. The extra mortar is basically saying - Okay USF can have its cake and eat it too.
Furthermore, if a mortar is really needed, the USF has a mortar halftrack anyway. I don't quite understand why a mortar is needed for USF in T0 when USF has a lot of options up its sleeve for MG counters and indirect fire.