So, I was on the boat that Bungie bungled the sequel too. However, after gathering evidence and articles from 2015-2017, I was amazed at all the bread crumbs that were left to follow. Activision brought in their own team, and High Moon, and Vicarious Visions studios all to help Bungie make D2. It's no longer just a Bungie creation. (Too many cooks in the kitchen spoil the soup.) In the articles, tweets, magazines, etc that I found... They literally spelt out the doom of D1 & what D2 would mean... "Destroy Destiny 1 and start over." "Reboot of the franchise." "Appeal to a much broader audience." "Eventually bring back elements from Destiny 1 in DLC and free content over the next year." "Rewrite the whole story, back story, and lore." "Change the game mechanics." "Change the loot system." And it went on. It literally describes what we got in D2. There really weren't many, or any, broken promises. I think the start of D2, the actual destruction of the Tower and all, was their way to fully show us what we knew and had before is gone. Let it sink in.