This was my post. Don't know what happened after it since I was AFK for the rest of the day.
I'm going to put here some valid agruments about the subject with a shameless copy paste:
"Being able to cook grenades rewards players too much for something that requires no skill at all, it would be fine if they did half the damage but they kill you in one hit 9/10 times without you even getting the chance to react."
"It's punishing players that want a close-medium ranged gameplay so much that half of the round is just waiting for people to get tempted to throw their grenades. I think spam grenades are fine, it doesn't do too much harm as they are easily evaded."
"Without cooking nades players throw nades from longer distancesinstead at close/medium, start learning positions to throw the grenades to other spots and overall increase the amount of planning and skill needed to delete someone in one hit, while also giving more depth to the gameplay at close-medium range."
"And yeah, grenades just laying on the ground for 4 seconds isn't great, but you could throw upwards and make them fall places and explode pretty much instantly. Like in CoD 1/2/4, people would practice grenade tricks and actually use them tactically when people are doing things like defusing/planting/holding higher ground."
"Grenades totally ruin all of that by being a better option than the guns in most cases"