The MW2 maps, especially the larger ones, are made for killstreak kills to count towards more streaks. I don’t think I’ve played one yet in 6v6 where max score was hit.
I played the OG MW2 and streaks could absolutely be oppressive sometimes, not going to deny it. I don’t think streaks in any COD have ever been as powerful as the 5-7-12 combo where the predator will often get you the harrier, the harrier literally contains the precision air strike 6 streak within it, and is basically as powerful as the overwatch helos in the new CODs, and then the 12 is either the Ass-Clapper 130 if you’re an ethical gamer or the Chopper Gunner if you’re not.
Nothing like that exists in the modern CODs. The Cruise Missile is six kills and it’s harder to use than the Predator was. The equivalent of the Harrier is the 9 kill overwatch helos. You know what was 9 kills in MW2? The Pave Low, which needed two stinger missiles to be taken down. And no one was taking down streaks in the old days.
We’re in the SBMM era with spawn protection. Let killstreaks stack on the (larger) MW2 maps. It’ll be fine.