Disagree with all three points.
TP is a good businessman. Like all good businessmen, he'll take his time evaluating the front office and learn a lot about the NFL from Russ. Doesn't mean he wouldn't hire another PRESIDENT someday, but it's highly unlikely he'll come in and make waves in year one.
Since Russ's role as team PRESIDENT doesn't include responsibilities for football operations, TP would be unlikely to limit what Russ does best...put fannies in the seats, market the team, look for new revenue sources, be an advocate for the Bills at league meetings, etc.
Russ is an upstate NY guy and the PRESIDENT position is his dream job. The league office is just a bureaucratic administrative function and not a place to shine or have fun. Nobody goes there if they can be in that exclusive fraternity of 32....