Game play wise it looks fine but it's not blowing me away. The guns have weight to them with good sound and shoot well with crisp movement I come to expect from Halo games so no complaints but only new feature I'm seeing is a grappling hook which I'm actually alright with. I like Halo when it has simple movement that emphasizes just moving about and shooting not tons of armor abilities/movement capabilities.
Graphics also not blowing me away but I do like that they're throwing it back with some CE inspiration. Style wise it looks fine but for next gen it should be better which I'm sure it will be once we get the final release.
Only thing I don't like is "open world". I'm tired of open world games and I just hope it doesn't have a ton of bullshit side crap to do with a good "main story" that just linearly takes you across the map.
Overall for a next gen game this is somewhat disappointing but I'll likely get it for the multiplayer anyways if it's good and not like Reach, 4 or 5