Left to Right or Near to Far is okay, but numbers really give the MD more options to make the shooters pay attention. Paying attention is a very important part of shooting a gun. We all need to learn it to it's fullest. There is really no excuse for shooting the wrong number target, other than you were not paying attention.
The limit of a 12x scope in Hunter has many limitations that aren't addressed by the use of bracketing. Seeing where you hit on a miss is most important in my opinion. That is why I quit Hunter class after trying it, before I shot any GP matches. I could "carpenter guess" the distant close enough when the scope was mounted real low to the barrel... all targets were within one and a half mil dots... BUT,
Wind reading and holding steady are the main factors as far as I can tell in this game... So, I'm for the sign markers and making them all the same format.... for those MDs that want to use em.
MD, Ashland Air Rifle Range