User blog comment:Xilinoc/Ch. 671 - The Perfect Crimson 2/@comment-27133783-20160421160358

People will overlook about Toshiro is that he basically put in good ole fashion training to develop his true bankai on his own. He didn't need no Soul Palace training. Rukia got hers because of Soul Palace, Renji basically was told by Ichibei. Byakuya I'm kind of 50/50 on because '"He had too be taken there in order for him to heal" but nonetheless he still trained there. But and a huge but is that he basically came to the conclusion that Toshiro did after their bankai's were stolen and that was to go back to the basics of their training. They were so quick to rush into Bankai and rely on it that they overlooked the fact that they still had plenty of training to do to perfect their shikai's and base abilities which would in turn help them perfect and refine their bankai's as well. For someone like Byakuya to say this when we know he is proficient in bankai already indirectly foreshadowed that of course Toshiro still had some perfecting to do on his own.