Dispersion
I fully agree with you. I also understand that devs use it for ballance reasons and to discourage long range engagements to some extend but imo it’s a bad way of doing things.
Personally I’d rather have sway that can be countered with hold breath and mounting. This way weapons would actually shoot straight and further accuracy would be user dependant.
In terms of MGs, they just need an overhaul. A big one.
Damage
While it is not depended on the shooter, it’s not easy to measure and give it a value. Even if we exclude damage to internal organs.
So imo it may look like it’s a hard stat but it isn’t.
As such I’m more or less ok with the current damage profile of smallarms. Exeptions being weak pistol cartridge (though SMGs compensate with rof) and tank MGs.

