Well, this is the same thought a friend of mine made on CEA. You see the problem is not that "it is useless" on console because it's better on PC, I know that, I know that every single game is better on PC, but if you've played every single game on console and you're used to FPS on console, you just can't switch to PC just to buy a 9 years old game that you already have on console and is playable on 360. I still have my CE disk, my Halo 2 disk, and they work, but they are ruined and old, and I'd like to keep on playing these games in the future; now, they made it for CE, now there's only one game that is not yet on 360, and if they managed to complete Anniversary while working on Halo 4, I just can't see why they shouldn't work on H2A while being occupied with H5.
I know, I know, it's a hard work, I'm not putting it easy; but we had 15 chapters in that game, and I think those chapters deserve to be reconsidered.