I hate nerfed grenades and I love grenades that behave like a fucking GRENADE would if it goes off.
They don't need to nerf grenades at all. Honestly, in Halo 3, I just fucking quit using grenades if they didn't stick to people. It literally felt like a grenade would go off two feet away from someone and not fucking do shit. They would then rape me with the overpowered melee.
So, Bungie, keep it the fucking way it is. It plays like Halo 1 or 2. I like killing four people with one grenade. KEEP IT.
Invasion is meh, but then again, I started playing it when EVERYONE was like "how the fuck do I play this shit" so I am going to give it another shot.