When you have a grenade equipped, you hit that button and its supposed throw the grenade. But 95% of the time when I try and throw the grenade, I do a melee attack. Plus they way they set up the different layouts on the PS4, you can't separate them. The melee attack and grenade throw button are always the same.
Who thought having 2 different attacks on the same button, that you can't change, was a good idea?
Also 75% of the time when I go to equip a grenade, it doesn't register and I have to do it again.