Planetside 1 had it...When you said Hail, there was a salute animation...There was also other animations for voice macros.
I'd love to see the arms flail around when screaming for Help again. Or waving the hand by the face when taunting as if someone just passed gas.
Old suggestion of mine: NC would have the traditional salute, either palm up or palm down; traditional respect. TR would have a fist over the heart; a sign of loyalty. VS would have their arm raised, palm forward, as if taking a pledge; a sign of devotion.