The pp19 would actually be a decent gun if the dmg falloff was 20m then 30m or even 15m then 25m. This trend of how all smgs and even carbines have to be 10m then 20m for their dmg falloffs is going to make so many guns just straight up useless.
To prevent them from feeling like ARs you would have more spread and/or lower bullet velocity than ARs so they would still have the advantage in that area.
It would be cool if they did actually change up the dmg falloff ranges depending on the guns. Having dmg falloffs at 15m and 25m or even 10m then 30m, completely skipping the 20m dmg falloff could make guns feel more unique.