Not sure how core mechanics like shooting and moving aren't as relevant to Campaign as they are for MP. It's easier to land shots in Halo 2 than it is in Halo CE, MP or Campaign, Halo 2 is dumbed down and less fun because of it. I conceded that Reach has better AI than Halo CE, not that Halo 2 has better AI than CE. I also prefer CE's Weapon Sandbox, as I have already stated, better Plasma weapons, better Utility weapon (Pistol>BR), Snipers and Rockets are better in CE, Shotgun is better, AR is better than SMG. And yea, you're right Dual wielding is a gimmick, and doesn't add anything of value to Halo gunplay.This tells me you actually haven't used camo in the way I described it. Its use is very limited but it can be very effective when used properly. 5 seconds on Legendary is very, very short, but it can gain a short term advantage when trading for the risk of being caught out in the open. It doesn't allow you to cheese your way through the level.
Yes, but the camo lasts a very limited time, and frankly by your own logic it is a gimmick in CE. The vast majority of the Campaign has little use of it.
And if you are going to describe certain sections where it can change up the game; I'd like to point out that your argument is silly because camo can be used (with the Envy skull at least), in every single Halo 2 encounter if necessary. Purely optional, of course. But it adds to the variety and reduces repetitiveness; something CE lacked in the latter sections.
This isn't a multiplayer discussion! We are talking about the Covenant vs the Master Chief; and in that regard the greater freedom of movement for the MC in Halo 2 is especially invaluable. The jump height in Halo 2 is vastly more useful; in addition to skulls which add to the variety of the game.
This isn't about "skill". Campaign gameplay is far, far, far more than aim assist. It's about a weapon sandbox, AI (where you have conceded on a number of fronts), presentation as you said and level design which goes hand in hand with encounter design. The vast majority of encounters in CE are short ranged anyway; vehicular combat tends to overwhelm the larger areans and that usually involves bumping everything to obvilion. At such ranges shotguns and grenade spam become king.
Accuracy is far less of a concern and hence hitboxes are less important than they would be at medium range.
Also, the health system is awful and should stay out of the Campaigns. CE's checkpoint system is a testament to that fact. I even remember one instance where I lost all my progress on Legendary TaR because it gave a checkpoint during Captain Keyes' death cutscene.
It's not just presentation; it's variety and content. Halo 2 has more ways to play the Campaign and therefore its campaign gameplay is not inferior to CE's.
As for Checkpoints, you can manage those much better by clearing areas before you leave them to force Checkpoints more often. Managing your Health is part of the game, and it gives you less freedom to YOLO your way forward like you can in Halo 2, because you don't always have the same Shields and Health like you do in H2. Backtracking for weapons and Health is very important for Legendary CE, it makes it much easier and less frustrating, it's also just smart gameplay, utilizing the entire Level to succeed.