JohnOfMars
Banned
You don't have time to play the game? It has been said that unlocks span across multiplayer and Spartan Ops, maybe even regular campaign (not sure about the last one, though). It's also been said that the unlocks are solely for customizing your loadouts, not for keeping you from using any of the weapons in-game.
Load outs also include armor abilities. Will those be pickups? Serious question here. Not trying to be snarky.
If loadouts only include weapons and abilities any one can pick up on the map and thus only matter in the first 15 seconds til I find exactly the weapon I want, then it's not that bad. An example of my point: In Reach, I love Hologram, but if Halo 4's Hologram takes me say 10+ hours* of multiplayer to unlock that ability then that's what I'm talking about. But the way I used to play and really enjoyed playing now requires a non-insignificant time investment.
Here's the biggest point: there will be tons of stuff in Halo 4 that I will never unlock. Never. I just won't play enough. I will be competitive right out of the gate, I'm sure. It'll be balanced so I can. In Reach, never unlocking everything just meant I never look the way I want. (I still really want a gold visor, but I don't have the time for that.) That never affected how the game played for me. Weapons, equipment, arbor abilities, etc will affect how the game is played.
I played Call of Duty Modern Warfare 1, about halfway through the campaign. And that's all of the COD I've played. So I have no clue how COD handles all this. From what I've heard, they have 2-3 times the number of weapons and lots of fiddly bits you can add to guns. Who knows how Halo 4 will do it. I'm definitely anxious to learn more. Maybe at E3.
* Maybe that's unfair, but there will be unlocks that require significant amounts of time.