Its not even close to the worst thing. The worst thing was letting 343 "Halo Studios" keep Halo.

At worst, we just get another bad Halo game. But with entirely different people working on it, at least there is a chance it could be better. Under 343 "Halo Studios" it had no chances of being good.

Activision is a publisher, they don't only make Call of Duty. They have a large variety of games they publish, including Blizzard's Overwatch, which while one can argue doesn't fit the Halo gameplay, proves that Activision has the capacity to publish FPS games that feel almost nothing like Call of Duty.