He fills a gap in their squad and provides a scoring option from midfield. He’s not a replacement for Rodri. That is a combination of Bouaddi and Anderson.
Yes they benefit from massaging their financial books and stretching out contracts to unheard of lengths. So Chelsea has stockpiled a lot of talent. You can’t do that anymore specifically since the PL changed the rules to stop it.
They have Lavia, Caicedo, and Hendo as senior natural CM options, none of whom you would back to go through the season without fitness issues. Xabi seems content to use one of his RBs there as well, with both James and Gusto doing it in the first two games, but who knows if he’d continue that with another quality legit option.
What I think is worth a fair number of people taking a step back and considering is how you’re responding to this news. Both City and Chelsea are still working on a huge deal that is important to both of them, with some additional dominoes needed to fall to make it work for Chelsea, on the last day of the window regarding a player its been known since before the last season ended was unsettled and likely to leave. We have fans who are viewing this late movement as a show of strength and ambition yet view us doing big moves late in the window as a show of not knowing what we’re doing.