3 ST - Conventional Pistols/Energy Pistols4 ST - SMGs. (Including the Tommy and G11)5 ST - Assault Rifles/Shotguns/Single Shot Rifles (Why do Pancors and Combat Shotguns require less strength than a CAWS, a basically identical weapon? WHO KNOWS.)6 ST - Two-handed Energy Weapons (Although I will admit I don't get why weapons that shouldn't have recoil are hard to fire. Heavy internal components, I guess.)7 ST - Big Guns
Most weapons already follow this, but I agree that the Tommy Gun and those other odd weapons should also follow it, just so that everything would be the same.
But i hope you know that other SMGs are one handed weapons (oh looks like G11 is two handed too, but no matter) and Tommy Gun is two handed weapon.So there is difference.