He's a very good passer, but I see him as average at everything else. He's not physically imposing, he's not particularly quick or agile, and he's not a great threat in the opposition box. I don't see him as an upgrade on Pjanic or Bentancur, and we need someone in midfield who's more dynamic, agile, and a physical presence.
Your suggestion to target someone like Kante was spot on - we need someone of that ilk. We basically need a Matuidi with passing skills and high footballing IQ.