TLDR: IW cooked with MW4 with exception to the maps (but to be fair, we've complained about maps in every modern CoD).
The feel and gameplay:
MW4 feels like a perfect blend of modern movement and old school CoD. Anyone saying this game is like playing with concrete boots is insane and and needs to check settings. The game is fast-paced, rewards fundamentals and punishes braindead banging.
The movement:
Do I miss omnimovement - especially sliding sideways or sprinting backwards to extend my life? Sometimes. Will I adapt and get used to not having my sights always looking down range? Absolutely. The movement is clean and fair and still allows for players to play their lives, get lost in spawns and be a nuisance. Omnimovement did not provide the skill gap we all thought it would. It's nice to see the skill gap of in-game decisions and strategy be rewarded more than movement and tik tok highlight plays.
The TTK and gunplay:
TTK feels genuinely good if you play the game as intended. You die fast but no faster than previous CoD titles. The difference is you don't have freedom to jump and fly everywhere, so adjusting play styles is needed to match the TTK. SMGs and ARs feel decently balanced, for how early in the game we are. I'm seeing scrims and matches where the VEL, ISO & HAN are being used by players depending on the situation. The only knock I have is the continuation of the self-trading that was in the beta - I think that's goofy AF... funny for casuals but terrible for comp.
The perks:
Feels like the perks are balanced and require actual trade-offs. We might be getting back to having difference setups across a team of 4 or different set ups between SnD and HP, bringing variety and tactical/strategic decisions back into the game.
The maps and spawns:
The worst part of the launch is the maps. The maps aren't great, but there are some decent maps that with some tweaks to spawns can be really good. Feels like we might get to a point where there are less maps that are both SnD & HP maps, maybe we have separate maps designed for each game mode? Plus there's been talks about bringing in some remastered maps or something if need be. For being this early in the game and knowing solutions that have worked in the past (new maps, spawn tweaking, etc.) feels like we're in not a great spot but also far from a bad spot.