Wonder how much of Vegas home success wains as team start making return trips. I think a lot of their success at home is more to do with unfamiliarity of building etc than the night life. Athletes are creatures of habit and like to have things known and comfortable.
It was funny the defence had different problems in the last two years 2016 they gave up a bunch of long drives limited the big plays. 2017 it was the big play that got them into trouble.
Not QB related but this is a great break down of special teams that Belichick has given in his press conferences over the years. https://www.si.com/nfl/2017/11/02/bill-belichick-press-conferences-special-teams-quotes
Have it as two separate leagues. Like baseball used to be. With a championship game between them. I would still have the championship game for the Canadian side play for the Grey Cup.