I have not yet seen the real use of the flashbangs, as they dont blind, damage or disorientate as they would in real life. Id like to see more blinding, some blur and some slowing on the persons affected. Maybe add some of the cool features of being almost-critically wounded, like having reduced use of the map and HUD. As this maybe would make them too powerful, you could give officers and such less of them.
At the moment, i see them as a toy to throw around at friends when you wait for a vehicle
I hope it was worth your time - terenz.

RANGERS LEAD THE WAY!!!
Do not post stupid suggestions just because you had a bad round in PR 


