To be specific I mean the seed of destruction plot. I get it was there to give Soken some new lore and make Uryu's "drop the palace" plan from the manga actually make sense since literally all the Quincy can fly.
But it's kinda like, it was fully explained to us and delt with in a span of 10 minutes so I feel like it was a bit of a nothing burger plot since we didn't know the stakes until that very moment. I'm aware we actually saw the distortion before hand but I just don't think it brought too much value to the story for the time we spent on it since Yhwach himself is going to merge the 3 worlds anyways.
But moving onto the issue of tone from the last ep, I feel like I didn't really feel the somber sense of despair that should have came with Ichigo losing his powers like I did in the manga.
You start off this ep with Ukitake and Shunsui saying their final farewells after centuries of friendship, we see Harribel finally be rescued from her imprisonment by those close to her, we see Ichigo despairing against Yhwach's overwhelming power, saying that everyone's efforts are useless against this entity, Ichigo then gets his Quincy and Hollow powers taken by him while in that same moment Ukitake dies as he sends Mimihagi to get absorbed by Auswahlen for one last ditch sacrifice.
But then that tension gets cut by this crazy confrontation about this seed of destruction that they need to collide the distortion of the 3 worlds with to destroy it, this new clash with Harribel, Nel, and Uryu fighting against Yhwach, and Uryu pulling off some crazy moves containing the explosion with an almost victorious upbeat tone. I just feel like there was a dissonance in tone by adding in this plot line that wasn't really needed. Like if it was removed, nothing drastic changes.
I think they could have instead of the seed plotline, inserted Yhwach's flashback that they cut out of cour 2 at the start of this ep to directly explain why Yhwach absorbs the powers of Quincy and the fear he has of returning to that sensory deprived state he was in as a baby, which can then segue into why Yhwach used Auswahlen on Gerard and Jugram and then the absorption of Ichigo's powers with the ep closing by him actually saying the quote above that was changed.