Whilst that's true, you miss the point of my comment.
We have a fair few CBs and not enough DMs. So much so, we use Bernardo as one.
In my mind (and one or two others) Stones would be great there and fill in as CB if needed. I'm pretty sure the CBs didn't get dragged all over all agame cos of the complete control of the middle. That level has gone up as Stones joins in the middle as he has the CB and Mid sense of positioning and timing.
I'd love him to make that his own, covering Rodri if need be. That would be a great test of his mid abilities.