Oh my god, I'm getting dizzy from all the moving of goalposts.
First, who mentioned VaTech? YOU. And only you.
Second, how big do you think the Big 10 will go? If you think 32 teams, then Washington and Oregon will definitely get bids. If you think 20, then it is far less likely.
Finally, as for "attracting more viewers", I don't know where you're coming up with that. As I've already pointed out, Washington/Oregon have a very powerful positive of being "virginal Big 10 territory" and would garner the higher carriage rate for the Big 10 Network. As would Miami, UNC, and UVa. So that part is a draw. But the part where "more Big 10 alums live in the east than in the west" is something that you just keep ignoring.
There's a reason why "footprint" will likely determine the next few teams to join the Big 10. If the Big 10 goes to 24 or 32, who knows? But the natural limitation on getting to those huge membership numbers is NOT about "desire", it's about the SEC counter-offering certain teams.
And in THAT regard, that's the OTHER saving grace for Washington/Oregon. They'll never get SEC bids. So if the SEC takes some of the east coast teams, then maybe the Big 10 circles back around to the Pacific Northwest.