Most of you noticed that scoping in Halo is little more complicated than simply on/off with pressing analog stick. When someone holds it for a sec and then release, it’ll unscope. It has sense with Halo 4, because it finally gave us most common control scheme of modern fps games (with scoping mapped on left trigger). It usually works well with both default and fistick control scheme, but there are times in the heat of battle when it gets confusing (when someone with default control holds stick for little to long, or someone with fistick tries just to make quick zoom).
I think best solution would be, if there’s option to switch scoping behavior, so each player decides what suits him best. Since there are 2 level of zooming with sniper weapons, fistick users could have use of trigger buttons being analog (it worked in Perfect Dark Zero that way). Tapping twice trigger button for maximum zoom doesn’t feel right.