I put in a long session last night and while the spawn points, remote control cars, map randomizer (we got Hanoi 3 straight times!!!) still suck, here are my pros so far.
- Chopper Gunner: Holy crap, this is awesome. It shows you sitting inside the chopper then they open the door and you take control of a minigun and look out over the whole map. It's not a black and white display like MW2. Enemies are red triangles and you just go off on them. It takes a 9 killstreak but only 8 with Hardline. I started a game 8-1 on Jungle. Got a chopper gunner and got 18 kills with it. Ended 33-2.
- Gas grenade and gas mask. I never used this in WaW but I'm finding it's great in this game. There are so many more campers it seems that you just toss in a gas grenade into a room or hallway and they have to move or else they die. It's great in Demolition since you often get 4 or 5 guys camping around a target.
- Zombie Mode: Good lord, it's 10 times harder than in WaW. I've only made it to level 11 with a team of 4.
- Map voting: Still isn't perfect, but being able to vote on maps is kinda cool. Unfortunately, 1 of the maps that come up to vote on are often the same that you just played.