HD, what happens if they have already gone through the heading specified? Doesn't happen often, but occasionally due to radar lag I have heard "turning back to xxx".
Talkdownman, not necessarily - exceptions to everything! When giving a reroute or weather avoidance I will sometimes say "fly heading xxx, when able route to <waypoint>". Would this also be used to VFR traffic avoiding cloud??
mxwbuaa, I think they both mean the same point, however several points could be given as a routing.