Not sure about a house per se, but a BJ show -- any show: a Graveyard Review revamp with a faux Jenna Ortega, a lagoon show, a stand-up set in a soundstage -- would've done gangbusters and given the event a much-needed jolt. But really, as much as I'm enjoying the IP houses, they're all sort of B-team (AQP may be second-tier A-team). FN@F was discussed to death, but Fallout would've killed this year as well.
And while I see the value in an open channel to Blumhouse -- bound to get another smash one of these days -- yeah, in the years without a smash sometimes less is more. Insidious house by itself would've been fine.