Just finished the game and am extremely upset with who dies and not hearing the halo music we all know and love. The new sounds are great and take some time to get used to for weapons and vehicles. The servers keep going down and can’t join friends online, so haven’t got to feel the online to much but it seems dated and boring. I think this is the end of halo without the music and who dies, it just doesn’t seem like halo. The loadouts are too much like COD and the matchmaking screens are cheap. This is why Bungie did Betas so that they could fix bugs and make the online matchmaking run right for release time.
Minor spoilers in there, edit it out 
But anyway, launch day was ruined for many people, I couldn’t play with my friends for the whole day 
Lol he uses the same mode as the Gregorian chant from the original Halo:ce theme in multiple themes. I liked this music much better than I like Reach’s (which wasn’t bad either).
And I NEVER expect Multi-player launches for big games to run right. I mean just this year we had D3 and GW2 with major issues on release.
I’ve got problems joining friends to but I’m sure that’ll be fixed shortly.