I have no idea if Mullens or Hall are mobile, running QBs or not. I assume they are. But if they are not I have no interest whatsoever in them unless they are the next Tom Brady or Peyton Manning.
We have seen the last of the generation of Drew Brees Phillip Rivers Kirk Cousins guys. You are just better off with a QB who can make a play with his feet nowadays, granted Cousins has improved in that regard under O’Connell.