Around 10ish they moved back the trick r treat Marge point and doubled the width of the exit which helped.
It was bad earlier. single file, so you moved at the pace of the slowest person to leave the house in the past 25 minutes.
[More general post]
Besides Stranger Things, noticed other ops issues. Poltergeist opened late after Stay & Scream, well after 6, and when it did, zero audio cues, just music. With a TM friend who told me they were there Wednesday, not sure if they ever returned, but bad show.
Express was handled horribly. They were clearly keeping to a quota--say, 30 Express, 10 standby--but they would do that even when no one at Express had their pass out or there was some other sort of delay. Should merge better, instead of sticking to arbitrary rules.
Stay & Scream in Finns was a nightmare. As
@Joe says, opening night is a "thing" now, UOR needs to recognize and staff for that. Or make it less open.
Even with Express, saw 5 houses before my feet and patience ran out. I now I'm immune to hype, but I'll warn you, the gushing praise I've seen so far will not age well. So far reminded most of 2012, with the soundtrack from Vamp 85 playing the role of "Gothic."