None of those would be attractive candidates. However, it is not just the metropolitan area market size that matters. It is the geographic footprint of their fanbase. For example, Texas is not just Austin, it is all of Texas. KU gets all of Kansas and all of Missouri. For that reason, Wichita and Creighton are worthless for TV purposes. Dayton could get some play in Ohio and Richmond in Virginia so maybe they would have some value.
But the problem with Dayton is that we already have that footprint in the east with Cincy as another eastern team on the eastern side. And we already have an overabundance of east coast presence as it is. Richmond doesn't bring anything to the table because it wouldn't be a western team. The spot that needs to be filled is west. And this is about all things not FB including women's sports.
We don't really need more of an eastern influence in the conference - we already have that. We need a western team because the ones most likely to "jump" are in the west. WSU solidifies the west - Richmond doesn't, nor does Dayton. If you think Cincinnati will jump, then an argument for that would be _"well, at least we have Dayton". That's not a good scenario - to trade Dayton for Cincy. Besides, a lot of the reason we wanted into this conf was our association with Cincy, ECU, UCF, Memphis, Houston, SMU, Tulane and their association with us. We also have that with WSU who was a memeber of the MVC and has some assoc with the teams who used ot be in the Valley years ago (Memphis, Cincy, Houston,TU). Where is our association (in the west) with Richmond, Dayton? There is none.