User blog comment:Xilinoc/Ch. 553 - Frozen Cross/@comment-7079377-20131017232010/@comment-11051098-20131018144452

Right. Byakuya had just regained consciousness the last time we saw him, so Komamura is the only captain left to see who lost his Bankai.

Regarding Hitsugaya's strength - remember that when he fought Bazz-B, he only had his Shikai. Against Cang Du, he had regained his Bankai, and it was slightly hollowfied. Who knows if that could have increased its power a bit.