Should you create a new character or not? What's new and different? Did my build get nerfed? Here's a full guide of everything you need to know, including changes Beth didn't include in their patch notes. This guide is story spoiler free so you don't have to fear having anything ruined for you. It also gives you a walkthrough of how to do the new quests and the old quests in a logical order if you decide to create a new character from scratch. Hope it helps!
https://docs.google.com/document/d/1gYahmgjUlernu_5Wn5QC7rCViydh0rh_tVR38IB2y3M/