Seriously, where is the fun in having to actually run around and manually get kills? This is where the brilliance of deathstreaks come into play: oh so you think you're going to get away with killing me consecutive times in a row? Nuh uh! Why don't I just drop a grenade while I'm dead and take you out as well! HA, massive pwnage.
If Halo 4 wants to compete with the top dogs it needs to go the whole 9 yards and include features like this. It's already on the right track but it's still missing a couple brilliant features. I like the idea of Distraction medals though. Definitely a good way to award crafty players like myself who generally avoid large scale firefights and go for the all important K/D ratio.