We've been over this before in other threads. It's nothing more than a generic first person shooter if you take away the theme and story of the game. That's already happened a few times with cutscenes and objectives (even new BSPs have affected it enough), and you're still talking about doing it now with scrapping dialogue and the final resting place of the Pillar of Autumn. Sounds like stripping out the actual "Halo" from Halo.

I'm not saying here that the new BSPs killed it- they expanded on the universe - but they still worked towards pushing it further away from the roots of the game (not to harm, though). Now it's getting pushed over the line.

Really, if you want to change this from "Halo" to "Guy In Armored Suit Lands on Ringworld Called Halo and Saves Universe", then go ahead.