Your take on the Super Bowl?

Underwhelming.

Tampa Bay was a quarterback away from competitive last year - they had a QB who threw nearly as many interceptions as touchdowns (30 interceptions, and now holds the record for most interceptions returned for touchdowns).  There are probably a dozen QB's out there who could have stepped in to run the offense and had a shot.  On top of that, they lured in several additional offensive weapons for this year.  Their defense was already stout last year, and after a few early missteps they were very good the remainder of the season.

KC, on the other hand, was missing 2 starting offensive linemen and had a QB dealing with a toe issue that limited his threat as a mobile quarterback.  Their defense was alright, but often relied on the offense to simply overwhelm the opponents with scoring.  They played really poorly on offense.

The Chiefs having the best right tackle in the league out and then also losing their starting left tackle to injury in the previous game had a huge impact. But Tampa played a great game and deserved the win.

Tampa only won because Brady cheated.

KC looked bad, almost like they were unprepared for the game.  I would have expected their offense to figure out some way to crack TB's defense, maybe not win, but to at least show up.

The chiefs didn't have much a running attack which made Tampa Bay play more pass defense against Mahomes. It's a very basic strategy in football to take away one of the two kinds of football offenses, run or pass.

I'd generally agree with your other reasons, too.