I disagree respectfully, grenades should not be free damage and kills, sliding under them is a counter and every attack in the game should be counterable, the point of the grenade is to flush someone out of cover hence why you can throw it beside cover and it will track them slowly, if you throw it at someone out in the open and on top of them then that grenade is going to connect because there is no time to run or slide but that shouldn't happen if you throw it in the general area and you can't even see them. If someone has the time to run and slide under it that means you didn't make the right play and push after them with the grenade tracking them, you should be on top of them right after it starts tracking them so they either have to eat the grenade damage or the damage from you shooting them with your gun as they can't avoid both at the same time. You did bring up a good point though, there are a few grenades that can't be countered, mainly shinobu skips and sticky grenades with the latter being the biggest offender, bungie needs to make a way to escape a sticky as right now they are free kills for the most part, I know one needs you to stay in the area it detonated to kill, maybe if they all worked that way it would be ok but fusions need a serious rework as it is. Good conversation and remember this is just my opinion.