On the other hand, having fewer people in the stands for the game will at least negate whatever advantage Tampa might otherwise have had, so the game will be more fairly balanced.
I think the various teams in the NFC West could with the right lucky breaks be viable near term threats. And Brady's clearly close to the end either way--perhaps if Tampa does win he'll decide to go out on top--so I think any period of dominance they might have would be shorter term.
I agree about the NFC West. That division might be the only group of teams that can stop Tampa. I would agree that Brady might go out on top, but I think he has a valid chance at doing so in the coming years (a la Manning in 2015). I think there's some unfinished business, an encore following what could be a 7th title. For instance, knocking off a Superbowl contender version of the Bills, defeating Belichick in Foxborough, and winning an MVP in two separate conferences. That goes with winning in both conferences. The Saints are done, so that is two extra wins for the Bucs. That division sucks so Tampa has a shot at being a very good team with an elite record.
Opening line has Chiefs favored by 3 over Tampa, which was posted at least five minutes before it became impossible for Buffalo to win.
I think the game at Raymond James Stadium would've been balanced with a full capacity. It's in a nice part of Florida and the league usually won't allow one team to hog all of the tickets. OTOH, if it's a franchise that isn't big in football, that may be different. The Chiefs are not the Packers, Steelers or Cowboys in terms of nationwide or worldwide fans but they represent.
As for Buffalo, similar to Cleveland, what a year! They both were trending that way over the past few years, and both lost to the champ in Arrowhead. The Bills will get their shot at Brady (if he returns for a 22nd NFL season); it just won't be until the 2021 season