Bankai's are useless, the Soul Society is being destroyed, and nobody thinks of using Kido? Why? What about Soi Fan's Shunko? If I remember right Byakuya was pretty good with Kido too. What about the Kido Corps? Did Hachi come back with the other Vizards?
Or did Kubo completely forget about this powerful set of spells he made available to Shinigami?