Really great animation for that final battle. Of course, with no more content to use the budget on, it's only natural that it would be able to look so much better than it almost ever does. And that's the end. I'm sure it will come back for another arc, but they may wait until the manga is over, so it will probably be a longer wait than the one year between the first two seasons of Gintama (and likely between the second one and a yet unannounced third one). For now, anyway, this was a good ending. Obviously it's left open for more, but it's not like InuYasha where they clearly haven't accomplished their goal. The series as a whole could easily end at this point, just as it could have after Aizen's defeat. It does seem a little strange to have it end on an arc that only lasted two cours, after the previous filler arc was just as long and the previous canon arc was a stupid amount of years long. Assuming the final arc ends up being closer in length to that arc than it is to this one, this actually seems like the strangest arc to end it on, as it will almost definitely end up being the shortest one. At least they didn't end up having to end it on a filler arc, and at least this arc came to its proper conclusion nicely.
I'd usually say something about the series as a whole, but... this is Bleach. Over the past 366 episodes, I'm sure I've said everything I have to say about the series as a whole. Not bad overall.
Series Grade: B-