As we get more and more info on Halo 4, the more amazing it looks. I am really pumped up for campaign and spartan ops! war games is looking pretty crazy too. Many people are saying Halo isnt an Arena shooter anymore. I disagree. What halo 4 is looking like is a hybrid of a class based shooter and an arena shooter (one hell of a mix).
Arena Mechanics
ok, there may not be regular weapons on the maps anymore (ARs, BRs, etc.), and you may not be able to pick grenades off enemy bodies, but that doesnt mean its no longer an arena shooter. There are still power weapons on the map (like the needler), and ordanince weapons (sniper, rockets)are also being dropped on the map just like how they spawned in older halo games. There are also still grenades to pick up off the map too.
Class Mechanics
On top of the arena mechanics are class mechanics, that allow players to play the way they want. You can chose to start with automatic weapons (AR, storm rifle), precision weapons (BR, DMR, Carbine), along side your choice of a pistol, armour ability, and two mods (that allow you customize your play style without giving you a crazy advantage).
And 343i have made sure that new players do have a chance against players who have played longer. They have access to premade loadouts that give them access to weapons, AAs, and mods that they may not have even unlocked yet. This helps balance gameplay.
Specializations
We just learned about these yesterday, and they are just extra mods to earn when you reach max rank. Nothing game breaking, but help people have more customization to their play style. Here is a thread that goes over how they work and are unlocked exactly. Here is some questions about Specializations being answered
Vehicles
Also seen in the article released by IGN, Vehicles have health that recharges now! Looks like vehicles arent going to be useless like in reach!
All in all, I believe in Halo 4. I think it is going to be the best shooter out there when released. What do you guys think?