In the same way that weapon and skill
levelling has been subtly adjusted,
killstreaks, the popular mechanic of the series, has also been tweaked for the better.
I think one of the things many things people misunderstood about Call of Duty Declassified is the fact that the game was built with a primary focus on the multiplayer aspect of the game, it has everything COD multiplayer on consoles has to offer, everything from customizable weapons and classes as well as perks and
killstreak rewards to clantags, full prestige
levels and ranks, challenges, game modes maps from the original Black ops etc the list goes on, I recommend people take a look at videos on youtube of Declassifieds multiplayer before taking a reviewers word for what their personal opinion of the game is.