There's something disappointing about how Tousen is being portrayed now. At beginning of bleach we could see Tousen as a calm, wise and fairly looking strong Shimigami; in the pendulum arc he acts likes such a weakling as if he is afraid of aizen instead of having respect for him.
You could see a difference in how Gin acts towards aizen and towards everyone, he never losses his cool.
In the end, all i see in tousen is weak and stupid man. How can someone live by the philosophy of "taking the path that has the least bloodshed" when that path has being filled with blood ever since aizen arrived as threat.
An even if that path is the right one, the fair question should be: Who is aizen? How did Aizen acquired such an immense strength? How could pulled everything without soul society noticing? because even though is sword is special, im sure it requires more than that to fool soul society like that.
What im really looking foward right now is for kubo to unfold that mistery that is aizen! INDEED!.