In Layout Mode, I'd wish to be able to assign arrowheads to lines. I imagine two uses:
1) I've seen many customers depicting a "workflow" on the layout for the enduser. (Not discussing UI here) But I see that it's often used and they use strange methods to draw the arrowhead.
2) I personally use the Layout functions to draw litte network schematics and illustrations for my customers... An integrated arrow would be nice here.