[Multiplatform] Modern Warfare 3 thread of not this shit again, aka I HEARD YOU LIKE LEVELING DAWG

I know I'm going to be too busy with Saints Row 3 to pick this (or, to be fair, Battlefield 3) up, but I like the fundamental change to the streak system - people had, I would imagine, been complaining for some time that having the rewards based solely on kills encouraged folks to ignore objectives - and the addition of a streak set tailored for the support-minded player.

Also approve in principle the idea of prestige actually being useful for more than bragging rights. Personally, though, I would have preferred it being represented as 'service hashes' without any resetting of rank or unlocks (though, as noted, you can still use a token to do so if desired).

Jam it back in, in the dark.