[ More casuality? ] Damage vs gameplay

In short:
The weapon is dangerous. So you have to put your enemy into fear that force them to do mistakes where this danger will disappear.

To be clearly understood, i will note an example:
Flashband can increase weapon spread that will make hold-fire useless
But flashbang can just paint enemy screen to blind color forcing them to shoot non-stop and kill anybody who came in because of stream of bullets. This way flashbang is a game mechanic that is useless.

Bullets stream idea is acceptable to jet-simulators, because you fight 1v1 most of the times.
You can experiment with
- accuracy/spread,
- flying bullet speed / count ammo in mag
- hold-breath button / weapon mass / time-to-aim
- with effects like supression / flashbangs / smoke barrages / camo-walls / team-bonuses that reduces that all weaknesses
- minimap visibility

but PLEASE dont experiment with damage, damage-with-range and headshoots. turn back to old bf3/bf4 ballance - snipers must hit twice, machineguns dangerous when prone, submachine/shotguns is dangerous on short, assault rifle - on mid-range, dmrs - like assault rifles but do more supression effect.

Otherwise it will kill the game. It always happens.