Ehh, to be honest, the chapter was a bit short for my taste.
However, I did enjoy Zaraki's appearance and am looking forward to the abilities he will display in this fight (that will hopefully last longer than others but not as long enough to get tedious).
As for Unohana's death—well, I still kinda don't believe that she's actually dead. These are probably arguments you've seen before, but we haven't properly seen what her bankai does, her whole "one of the strongest captains in Gotei 13" image hasn't really been.. ah, fulfilled (though the flashbacks could have slightly), and, well, this is just my opinion, but I don't think Isane is quite at the level of captain yet. Thus, having Unohana's position replaced by Isane would be.. er.. I dunno.
Darn it, Kubo. How many chapters has it been since we've seen Ukitake? Ah, yes, chapter 547, that came out in ((September)), where he was last seen in front of a lotus-like thing which apparently symbolizes rebirth. And you also apparently said that he would be healed, like, last year. What a cliffhanger. I've been waiting since that chapter came out for more appearances of him only growing to be disappointed with the arrival of every chapter.. sigh.