Glad to hear that you enjoyed the quest, it's always great hearing how much fans enjoy our work!
As for the countdown in Stranger Things, originally the 5 minute countdown was doable, however after we added in the AoE rebalancing in this release we got a lot of reports about 5 minutes not being enough. Look forward to the next release where we've slowed down many of the enemies during the countdown as well as extended the timer to compensate for the extra time the fights would now take!