Enjoyed the first Hyperion, but Fall of Hyperion was a bit of a slog for me. If Fall of Hyperion were compressed into the conclusion of Hyperion and other stories left as novellas (in the way James S.A. Corey has done), I think I would have enjoyed the story more.
In contrast, getting through Hyperion was hard for me (some of the character stories I LOVED and some felt like a slog), but I really loved Fall of Hyperion.
I did find the transition from Hyperion to Fall a little jarring. It has a completely different narrative structure for a start, but more importantly the scope goes from a single group of people doing a pilgrimage to a huge interstellar conspiracy. I think it works best if you read each book slightly separately rather than as one huge work.
Yeah, Hyperion had an interesting structure, but the second book was quite basic compared to that.
If The Fall of Hyperion were 1/3 of the length and part of the first book it would be perfect.