Oh boy, can't wait for "Grenade of Grenade: Modern Grenade 2". Seriously, CoD4 multiplayer gets boring lightningfast due to the IMMENSE grenade spam. People just toss all their grenades once they spawn, use the rifle grenades asap, and once depleted; start firing in random directions, die quickly, and repeat the whole process. Now top this of with Martyrdom, and extra grenades perk. It's rare to NOT find a grenade indicator on your screen at any given time. Ok so I'm exaggerating, but that's pretty much how it is.
I really really REALLY hope that has been addressed for CoD:MW2.