I do agree we need a lot more than Locatelli to improve our squad. But truth is, I don't even look at this like one signing. I still believe our biggest signing was/is Allegri and him being here makes our squad look completely different. I also expect many players to show totally different performances (like Bentancur).
I do think we won't say mercato chiuso after this signing, though. We'll sign some other players too but I don't expect huge names surely.