Charlaquin
Goblin Queen (She/Her/Hers)
There are two different problems with Tyranny. One is that when it was originally released, the combat balance was all out of whack, because it had been written while 5e was still in development, and some of the monster stat blocks changed between the writing and the release, which threw off a bunch of CR calculations. This issue was fixed in the later re-release.Is Tyranny as bad as some folks say? That's a good price for a big fat module.
The other problem is that it’s incredibly railroady, particularly in the first half. A group who is ok with just going along for the ride might not notice, but the structure really can’t handle the players going off-script.
The set pieces really aren’t bad at all, especially now that the balance issues have been addressed, so you could re-purpose the material in the book and build a better adventure out of it. But, in theory you buy a pre-written adventure path to save yourself that work. Tyranny is unfortunately really inflexible when run straight out of the book.

