If this truly was the only way to keep the Bills here, well, ok... But you know, I hear this all the time, and it just doesn't make much sense to me. Why can't a RWS renovation give the league everything it requires? If the reason is to enable the team to have scores of luxury corporate suites (which is where the big money comes from), well, who are the WNY businesses who will snap these up, anyway? Build it, and they still won't come. And that's not money split with the other teams anyway, is it?
It can't be simply to provide a good looking stadium for the tv audience, because, really, all you see is the field and announcers for 99% of the broadcast. And besides, isn't it more in the best interest for an NFL to show a packed house full of rabid fans instead of a pretty stadium? That provides an image that your product is thriving. For excitement and electricity we can match any team in the league (e.g., the prime time Dallas game).
If you need to increase the gate so that there's a higher split with the visiting team, well, I get that. But , my observation of the local game-going fan base is that the number of new "fair-weather" fans you bring in to a new stadium won't begin to offset the number you'll lose if you double or triple the cost of season tickets.