User blog comment:Salubri/Whats Wrong in the Storyline of Bleach/@comment-117598-20120820134858/@comment-1706259-20120820141830

Haha, that last line is a bit true. Ichigo just has plotkai and was Aizen's experiment. If Aizen sama thought Ichigo was special then I will not doubt him or Kubo, but developing Ichigo more couldn't hurt. Hopefully he goes to his inner world soon. Btw in canon a far as we know 2 different groups have attacked SS since the Soul Society Arc: Ichigo's group of Ryoka and the Vandenreich. Filler is just that; filler content.