No no, literally any studio would be an improvement coming from 343 "Halo Studios." I would take a Halo game from an Electronic Arts or Ubisoft studio at this point. There is no way to make it any worse, so at most it would stay the same.
I certainly would have preferred not Activision, but at least they have a lot of experience with a wide variety of games they published. There is more potential there than with 343.