User blog comment:Xilinoc/Ch. 663 - GOD OF THUNDER 4/@comment-893798-20160218170357/@comment-11293956-20160219025154

The power boosts also give the soul reapers a reason to use their Bankais. I doubt Shunsui would've used his if he was able to beat Lille easily. Both Gerard and Askin being as powerful as they are right now give Shinji and Kisuke a reason to use theirs in their fights.