Allow me to echo the previous posters in that (1) there was no way for our team to be in any way proactive to the plot. We were simply there to react to the scripted events. And (2) the final encounter is a tpk machine at Tier 1-2.
That said, the plot is excellent. It fits perfectly with the season metaplot (the Shadow Lodge had its reasons for doing what it did after all). The factions-within-factions is an excellent wrinkle that we should see more. I'll run this module, but only at the higher tiers.