(Copied from original User Voice forum)
"Walk tool upgrade to "flytool" as following:
WASD movement where WS keys move with camera forward and backward vector. For example if You look down and walk forward You will go down more as You look more down.
Could be binded to holding right mouse button down while at Walkmode. (Changeable)
More natural movement control to all gamers out here.
Also QE keys Up, down are then not needed."