Thats another idea that could be pretty cool but not easy to do.
I just realized that many professional players often forget about things.
Is it a lab in the enemies base or a nicely prepared drop that loses its advantage because the units just sit where they've been dropped without doing stuff.
So i think it would be pretty useful if you could for example hols shift (to see the orders and waypoints) and then do something (like clicking on a waypint with rmb while b is held down) so the order gets marked.
As soon the order is fullfilled a voice notification says something or the point gets pinged or both.
Sometimes games are even lost simply because players forget something so this could be pretty cool