I disagree with everything you said besides graphics and keeping physics the same as the first game. Armor abilities would absolutely ruin the game, and the warthog IS Halo CE. You cannot get rid of the warthog in this game, as it was a staple of the multiplayer experience (especially CTF). No new weapons, except perhaps the flamethrower + fuel rod (from Halo PC). Honestly, I wouldn't mind assassinations, but I'd prefer it if they were kept out also.