I think you have to look at this in the context of the overall rules, however in the main I would suggest that pre-measurement implies that geometry and the arbitrary distances imposed by rules mechanism are somehow significant.
Rules which involve geometry and the minutiae of various distances, also generally involves a lot of faffing around and grown men arguing about whether something was ‘in’ or ‘out’ of range. This can also encourage over optimistic movement aka cheating. Now, I don’t mind this stuff in the context of Funny Little Wars, which is played in a heroic and gentlemanly spirit, but when it comes to say, DBA it puts me off completely.
If you want friction use cards, randomised movement, orders, hidden moves or whatever with reliance on arbitrary ruler based distances a distant last.
"Mistakes in the initial deployment cannot be rectified" - Helmuth von Moltke