User blog comment:Xilinoc/Ch. 564 (Mask is too fabulous to live)/@comment-117598-20140115180531/@comment-1747976-20140116040046

Though it's true we are not the authors... we are STILL the constituents, the readers... and as such, after a while, one can fill in the blanks. As for Renji not being fully accepted by Zabimaru and in this case, respected, then we don't have to look to filler arcs for evidence of this...just look to Ichigo. While the Old man had his back, he still had to earn his respect to be able to use him fully. He also had to earn the same with his hollow who we now know represented his Shinigami powers. Renji didn't exactly have the page time to develop so cut him/Kubo some slack. Also, it's not like he learned blade zen or like Byakuya started sharing trade secrets with him... However to Byakuya's credit, he did tell him it would take time to develop. We must also remember that Renji is a bit dense...