The issue with changing the charge that will be difficult is that it's a sniper rifle. You should be able to knock someone with it. I think it should be taken down damage wise until it takes 3 rounds to knock someone if you land all the shots. You can't knock someone with a shield with it I don't think, it takes 2 hits at least. The issue is that it's screwing people up that are in a fight, they get 3rd partied by someone with a charge rifle who can dictate the fight with little risk. It's fairly easy to sit up on the ridge and 3rd party people in the city and wipe multiple squads without having to move. The reason is that those people can't get cover while being engaged with another team. Otherwise it's really weak and easy to get away from if you're not in a fight.
I think we either see a cooldown put on each round, to allow the enemy to get cover or move between shots easier, or a damage nerf. I don't agree with either, because I love the thing.