I don't envy the folks at Arrowhead charged with balancing Helldivers 2 guns fans have grown attached to. Arrowhead has rolled out a handful of sweeping balance patches in the game's first few months, all of which I believe made the game better by both buffing guns with untapped potential and, less often, nerfing a weapon that's dominant to the point of being boring.
But there's an argument to be made that balancing shouldn't be taken so seriously in a purely PvE shooter like Helldivers 2...