Originally posted by USC
I think it's to reflect the fact that Elite troops are elite because they have come to know their weaponry, and when they receive new weaponry, they still have good morale and general training (and so are better than regulars), but are not acquainted with the best tactics for their new weaponry. The levels of expertise links to vets and regs only reflect general training (regs) plus that and morale (vets). And conscripts are lucky they're holding the gun by the right end, so they can't get any worse.