In my personal opinion flashlight should be brighter, it's almost impossible to see stuff in the night when you use it. Also, it requires a good lens flare, when looking on it. It should as well be brighter and more focused!
Flashlight won't blind anyone when you flashing it into someone's night vision goggles, which is completely unrealistic!!!
It also lighting though walls, why I mentioned it's ability to light though walls? Because when it lights though walls it just completely kills the major tactical purpose of flashlight, especially when you cleaning the house out (on some sort of a SWAT mission) and you compete with the other team. AI will not react to flashlight, but other players most likely will. As they are going to see where the light is coming from, they will just shoot you through the wall, and kill you with a recently implemented bullet penetration...
Watch this!
https://www.youtube.com/watch?v=2aOlrRrD-LQ {F19809} {F19810} {F19811} {F19812}