They should decrease the stagger from normal ranged enemies while sprinting to a minimum or remove it.
And charge abilities shouldn’t be effected at all, you’re usually already putting yourself into a dangerous position with it, the stagger on charge punishes you and breaks your flow, it just doesn’t feel right for melee combat. The only enemy that should stagger/push you with ranged should be the gunners and snipers.
Especially playing as Ogryn, getting staggered from ranged should be way harder since cover is not a real option for you.