@ Chumbles :
You wrote :
"so if you've decided enough to save it,..."
Saving orders does not mean that something has been decided. Indeed, for example, whenever I check a game for the first time in a Phase, I always save some order, even a temporary Support Hold, so that I am sure that I will not NMR. And so, most of the time, I save orders, even though all my orders are far from being decided yet.
Also, even if the person has decided his orders for the current Phase, it is possible that he doesn't have the time (family, school, work,...) immediately to study the map, or to write to other players, for the next Phase and so, even though he may be ready with his current orders, he may not be ready for the turn to happen.
Anyway, wathever happens, players are entitled to use the full phase, it is what you signed up for.