The more I think about it, the more I would want Moraine as a future site.
I looked back at the 2016 course profile, and it is awesome with respect to bunkering and small landforms. The visual texture of the course even looks like it would present well on TV.
There's enough length out there for Moraine to stand up to an Open.
The routing looks like a good one for spectator flow. There are many hills and mounds to provide vantage points as well.
Looking at the satellite imagery, transportation access seems fine. It looks like there are many options nearby for remote parking and shuttle bus systems. There's adequate room around the greens for grandstands, etc.
The only logistical minus is that the area around the 9th/18th greens is a bit tight for the usual final hole bleachers. If the nearby practice green were relocated and the 10th tee were moved forward a bit to clear some room, that problem would be solved.
Moraine is a top-notch Golden Age creation that translates well to the modern era. It's "new" and "old" at the same time -- which beats a modern-day contrivance such as Erin Hills.
Finally, the geography is fairly desirable -- it gets an Open off of the coasts for a change, though I'm not totally sure we can call Ohio "midwestern". I've been to Dayton a few times; it seems to me the area could reasonably accomodate Open travelers.
I wonder if the club would actually want to do it. Moraine in let's say 2030, perhaps?