Pros: There are some much needed small improvements over MW, like if you die when you're holding a grenade, you actually drop it. The updates rules for domination that switches map sides at halftime is good for balance too. Shotguns are a secondary weapon. I love that kill streaks are now score streaks. Mines are now field upgrades. Wild cards are kind of cool and add new flavor to glasses.
Cons: None of that really matters when they killed some good stuff from MW. Weapon customization is virtually useless and boring because every single weapon has the exact same attachments. Operators are bland, with no customization, they don't even equip your favorite class anymore. There is no variation to make customization fun. No more barricade mounting. Oh and quick scopers are still OP and annoying. They also give you zero indication in the menu that you unlocked something new. You only get the notification after a game is over, and if you don't get to it right away, you're likely to miss it and forget it's there.