Facilities and fan supports an ingredient but if you're not consistently winning across coaches it doesn't matter. There's no guarantee on their side the Dayton wouldn't be a bottom feeder.
Dayton and
St Louis have flashes of successes but consistent enough or across multiple coaches. What value does either program bring to the Big East? They've got a national title 5-6 bids to the NCAA's every year. To them it's no guarantee the program does anything and they have to cut us in on NCAA/Fox money
I discount the Jesuit angle or
Xavier doesn't want to share Ohio angle.
In 2013 when the decision was made Creighton had 9 NCAA appearances since 1999. That's more than Dayton and St Louis put together in that time span.