Paul Farquhar
Legend
The NPCs barely have names, nevermind personalities, motivations and agendas. So there is nothing for the players to interact with. Sure, you can add that (and I don’t doubt it will be in this new version), but there is nothing in the module to suggest that you do. You could add politics, trade opportunities, all sorts of things to make it a better sandbox. But none of that is actually in the adventure, nor is guidance for new players on how to create it.But I think you are missing the point. If a group showed up, they could spend many sessions just exploring the Keep itself; navigating its politics, befriending people at the Traveller's Inn, helping the priest, gathering rumors
From what you say, it sounds like what was good was your DM, not the module.