All autoguns should have a status effect and deal damage based on plague/pepperbox, so that plague and pepperbox won't be out of line and so that autoguns on the whole won't be such a dominant force in PvE.
Blitz gets stun. That goes without saying.
Grim repeater could get sleep, curse, or possibly stun.
Similarly, acheron needs to be a curse/sleep/stun variant to balance it with obsidian edge etc.
(On a side note, amputator needs a buff.. maybe give it heart attack as a status effect?)