The guns dominate Halo 4 gameplay. Kills were FAST. I mean like kids were sprinting towards me with the swords and I could take them out with the BR before they got to me. That's unthinkable in Reach. Felt more like H2 than any other Halo.
Played for about 3 hours on and off. The first map I played was Adrift, 8 player Regicide. It was interesting to to always know where the guy in first place was. It was fun when I was king actually. You get quite a rush when you know that EVERYONE is coming towards you at that very instant. Quite a "back to the wall" feeling. It's a good fun gametype. It's still essentially FFA though, the gimmick doesn't destroy the game.
Guns
BR - feels a little hard to control at first, this thing will take a while to master. But when it works, its glorious.
Carbine - much more precise than the halo 3 version, something I hated about the H3 version was that its spread was huuuge. This time it's got Minimal spread. fun to shoot
DMR - the thing is a beast at long range. It will lose to a BR close up though.
Scattershot - felt like a silenced weapon from battlefield. fun to get kills with. big spread so its only worthwhile close up.
AR - the thing is a beast at close range.
magnum - straight up garbage. good for single headshots I guess.
Armor Abilities's - they didn't dominate gameplay like Reach's AA's do.
hardlight shield seemed pointless. Some guys used it against me and I beat them every time. not to mention they are very vulnerable.
jump thruster - It doesn't seem to go very far or fast at all.
pro vision - I probably used it about once every 5 respawns. it's good to see if some guy is camping with a sword around the corner or if he's sprinting away to teammates. Didn't feel very OP at all. It's essentially babbys first radar.
Game is good. My first impressions with Reach were "Grenades suck, bloom sucks, AA's are overpowered." Impressions with 4 were, "gunplay is good, I want more." My friend rev3rb, who longs for the days of H2 and hates reach with a passion, couldn't get enough. He never liked the Reach Beta and now he has high talk of h4.