there's some stuff that I wouldn't mind being fixed. For example, in one cutscene, grunts just slide around instead of moving. I'd fix that. And why not use more detailed skeletons and physics too. I'd like to see a bit more of a revamp than mapping newer textures onto old models.

To add real value, I'd add another (short) campaign, where you play as the spec ops commando, and retake the brute cruiser. It would even tie in to the beginning of halo 3 really nicely!