Edit: 11.1.2022
After playing the game for roughly 370 hours, I can say that while the campaign still rocks, the multiplayer live-service is nearing a disaster. There hasn't been any kind of patch and the problems are starting to mount. The poor netcode, hit reg and desync make any kind of higher-tier ranked gameplay unbearable. The amount of times you die because the game wouldn't register your last-hit on the opponent is starting to increase. The amount of maps and mods haven't increased since the community made a strong demand for a slayer playlist to be added, to which 343 responded by villainizing their customers and ended up making excuses. The playlist was suddenly added after a strong backlash.

As far as a live-service game goes, it's done very poorly and after while, you will get annoyed and bored, while the games overpriced ingame store works and will try to milk you of your money for badly done and packaged customization items.

Giving it a negative review for now.
Get the campaign, dodge the multiplayer for some time.

Edit: 11.1.2022 After playing the game for roughly 370 hours, I can say that while the campaign still rocks, the multiplayer live-service is nearing a disaster. There hasn't been any kind of patch and the problems are starting to mount. The poor netcode, hit reg and desync make any kind of higher-tier ranked gameplay unbearable. The amount of times you die because the game wouldn't register your last-hit on the opponent is starting to increase. The amount of maps and mods haven't increased since the community made a strong demand for a slayer playlist to be added, to which 343 responded by villainizing their customers and ended up making excuses. The playlist was suddenly added after a strong backlash. As far as a live-service game goes, it's done very poorly and after while, you will get annoyed and bored, while the games overpriced ingame store works and will try to milk you of your money for badly done and packaged customization items. Giving it a negative review for now. Get the campaign, dodge the multiplayer for some time.