Many might disagree. But it just my opinion.Why - we've already got 4 plus Dier and Davies who have both played for their countries (and us) in that position. I think 6 gives us sufficient cover - and that's not even taking into account Tanganga who played today. Think there are more desperate positions to fill - well only two desperate ones really and that's full backs. Anything else is a bonus boost to the squad.
We have quantity but not the right quality in cb. We can said the same for our rb and lb. But given a choose to cover just with an expensive signing, I would choose a cb.