As for Killstreaks Sledgehammer have opted to return to the idea of Scorestreaks instead so that completing objectives and getting assists all count toward them, while also introducing customisation options. (wolfsgamingblog.com)
Fixed an issue user from backing out into HQ if user accepts an invite to a lobby while in Scorestreak Training (xboxenthusiast.com)
Players can take control of the map - based scorestreak to unleash a barrage of missiles that annihilate enemies. (jamiex66.com)