Absolutely, every single player should have competition for their place or do you disagree with that?
Leaving alone the idea of him not playing as well this season because I think that is a total reach on your part...
I don't think when you have an established, standout player, one of the best in the world at his position, in the prime of his career, you go buy someone to compete for his place. How is that smart player personnel policy? The idea of cover sort of includes a drop-off by definition, but Milner and Gomez are adequate in a pinch.
But again, we have a top left back so we do not need to buy another one. Think of it. If JD went and recruited another world class antagonistic poster with a special skill at repeating himself over and over and over again, would you feel a little undercut after all the work you've put in to be a fly in everybody's soup? 🙂