This idea has been somewhat lost in the shuffle, and really deserves a full hearing. Both posters suggested interesting Eastern pairs; here's a quick brainstorm on a couple of Western possibilities:
1.
Yost (Ann Arbor) and Munn (East Lansing)The stipulation would be that if the Wolverines qualify, they have to play at Munn; if the Spartans qualify they have to play at Yost. I'm sure an enterprising T-Shirt guy from Ann Arbor could come up with an "Overrun Munn" design if the need arose. Minor tweak, I'd let each building keep its title game.
2.
Mariucci (Minneapolis) and Amsoil (Duluth) Same idea. Gophers would have to play at Amsoil; Bulldogs at Mariucci. Otherwise, teams are placed in regionals according to the current system.
With each pairing, you'd have two large fanbases with a chance to host within commuting distance. All buildings are designed specifically for college hockey and have considerable college hockey tradition. Located in college hockey hotbeds, you've got a decent chance of grabbing some neutral fans. But using the building pairs, you eliminate the much-dreaded possibility of a team hosting on its home ice. Yes, the phrase "campus sites" has become a profanity in our world. But as the selection of Notre Dame this year shows, the buildings themselves are still eligible.
Note that I would
not select either the X or Joe Louis. The NHL buildings are just too big for any likely regional. NHL buildings shouldn't be utilized for regionals unless it's the only viable option. The X once had a UND/MN regional match-up. In other words, the perfect storm. The building was half empty.
As for
Columbus -- a Definite No. Both the Schott and Nationwide are too big for regionals. We simply don't have a building suitable for hosting a regional, much less two. And while the local hockey community has grown very nicely during my years here, we don't that large pool of fans that would qualify us a college hockey hotbed. It's not even close.
But you're assuming that all the games have to be played in a 2 day period. Tweak that, and FiveHole12's idea could work. How about this:
In 2018, the FF is in St. Paul. Fans from the Upper Midwest might be game for regional travel in that particular year. So in 2018, let's put the two Western Regionals in Tampa. Yes,
Tampa, Florida. Midwest Regional is played Friday/Saturday. West Regional is played Sunday/Monday. Saturday is a little busy with the Midwest Championship Game and 4 Western practices, but I'm confident that an NHL facility could handle that. Might have to be just a little flexible on locker rooms for the practices.
Maybe crowds would still be poor; maybe the mausoleum atmosphere would still prevail. But at least everyone attending would get a trip to Florida out of it.

If you've spent the day on the beach, maybe an evening at the mausoleum wouldn't be so bad.

And for those who love neutral sites, this would be about as neutral as you can get.
Anyhow, there you go: Three more ideas for improving Western regionals that wouldn't require a major policy change...