Overall the new series is quite good. Seeing Kenpachi vs Unohana was fan-freaking-tastic. Very satisfying. The manga didn't actually...show...or explain...Unohana's bankai except a single image of it kind of turning into blood when bankai was invoked. The anime was kind enough to actually show it in action. Funny enough there was no dialogue to this effect, but the animation is self-explanatory.
I think with some of the other stuff, the anime's omitting small bits of dialogue here and there which added nuance to the plot - for example, when Mayuri explained to Ichigo how damage to bankai is permanent - that conversation omitted details about Ikkaku's bankai getting damaged by the Arrancar and Renji's bankai missing the segments destroyed by Byakuya and another Arrancar, and how Komamura's bankai can recover from damage but only because it's linked to Komamura's health, etc.
Seeing that, and the other "exposition" scene the anime added (Ywach's partial defeat by the Gotei 13, 1000 years ago), which ALSO lacked dialogue, I'm wondering if the terms of the anime adaptation are "no dialogue revisions or additions, but minor cuts are allowed". That would make me somewhat sad, as, again, my LORD it seems Kubo either A: didn't have an editor or B: ignored his editor during this arc.
To be fair, he also did that during the Aizen Butterfly arc. It was just a lot more egregious this time.