How to counter a Charger as a Gunslinger
Aim your gun, shoot head. (Hand cannons or pulse rifle are best)
Do not un scope, throw a throwing knife. Let the aim assist do the rest of it for you.
If you get killed by shoulder charge you don't deserve to own this game. My main is a hunter by the way. If you can't see someone charging at you and can't read your radar, you honestly and truly suck. [spoiler]I do have a titan, but haven't even started striker[/spoiler]
About as much skill as it takes to come whine on a forum it seems.
That said, no. Shoulder charge stays and people like me will still get kills with it.