I 100% believe the arc was gonna be ALOT longer than we got. Imagine Yhwach comes back down to the SS like he did and actually wins and combines all 3 worlds into one. That would end Part 1 of the Blood war and then we would get a big timeskip and start part 2 where we see how our characters are getting on in the new world and them trying to find a way to fix things etc.
Yeah doesn't help kubo was given 6 or whatever chapters to end it when it felt like the arc was only truly getting started. The Wano and Naruto final war of bleach but longer and better somewhat.
MHA was supposed to do something similar but horikoshi wasn't able to keep it going with his severe health issues and such.
I was expecting ywach to win and thus what you said happen, even leading into the hell arc.
Ywach was too important to go down that soon.
That would have been amazing if it happened.