If his attributes are to be more attacking, then I don't think we really need him?
We need someone behind the ball and not caught regularly ahead of it in the present midfield.
Especially so, if we do complete on Grealish.
If you are saying he can be a midfield destroyer in the Fern fashion, then I would be all for it, but still not at expense of Bernie.
I'd be willingly offering Rodri back to Atletico for Saul first.
I don't rate Rodri and I know it puts me at odds with both Pep and the majority of Blues, no doubt, but he lacks the two ingredients that I personally want from any defensive midfield screen, which is energy and a willingness to get hurt.
If Castles is floating this idea, it tells me it is nothing more than a staging post from Mendes, a suggestion at best.
He knows the market is suppressed and the £80m Bernie is worth isn't out there in cold hard cash on the continent.