We are getting, at most, about 60% of the material that the manga actual needs.
400-500 chapters is the appropriate range, imo.
We could’ve had ample world building, revelations, backstories, flashback arcs to Heian Era, the origins of Sukuna, Kenjaku and Tengen, the history of the Gojo Clan and Six Eyes (and an explanation why Kenjaku never took them for himself), the merger and so much fucking more.
Gege straight up quit. He’s a quitter. That’s his legacy and JJK will age very poorly. It already has, for me.