(All of these are my personal opinions)
1. Climbing - to me climbing walls and objects etc. Feels a bit off, sometimes it lets me climb something the other times it doesn't even show the button to climb it. Ive died numerous times due to this and I feel like it needs to be looked at.
2. Weapon Flinch - The flinching in this game when youre getting shot is like CS:GO when you get shot with no armor on. Its ridiculous and makes you miss a lot of shots and lose gun battles.
3. Flash Grenades - To me personally, Flash grenades last waaaayyyy to long in this game, needs to be reduced a little bit
4. Snipers - The damage on the snipers doesnt seem to be 100% accurate since Collaterals and such dont seem to happen to much (for me atleast) it seems to be easier for me to get 2 people with a single M16 burst, than it is for my snipers to get 2 kills with 1 bullet.
This is it for now, please let me know what your opinion is on my suggestions and please let me know what you think should be fixed.