Buff the charger:

Couple ideas that would work (on their own though)

1. Let the charge stick allowing us to pre-charge the charger
2. Increase the range of the charger & lessen the spread a little
3. Shorten the charge time by about 10-15 percent

As someone who's tried using the charger desperately, it's really hard to get a shot off in most circumstances before I'm already dead, It needs some level of buffing purely to allow it's TTK to actually get a shot off compared to the other shotguns. This is seen very heavily in Onslaught thanks to the fact that we'll see both the Plow & Blitz being able to be comfortably used while the Charger has a really rough time being able to actually be used, to the point I'd rather just use my pistol if I'm bringing the charger in (Which I never do anymore for this reason.)