Kubo dropped the ball by not giving Tatsuki some sort of special power like Orihime & Chad, so that she could have an excuse to stay in the plot instead of fading into the background of Bleach's over 9000 characters.
Magus said: Kubo dropped the ball by not giving Tatsuki some sort of special power like Orihime & Chad, so that she could have an excuse to stay in the plot instead of fading into the background of Bleach's over 9000 characters.
You never know after BLEACh os done he might do a spin off Manga starring Tatsuki