I was thinking about this, and in hindsight, the coaching may not have time to think it threw better, but 2 things in OT drives that could've been done diffeently for a better outcome, especially #1.
#1, take a timeout at 3rd and 4 form the Chiefs 8 to draw up a 4 yard play specifically for the blitz. You're already well in FG range they only needed 4 yards for a 1st and goal. Instead you had Purdy throwing a ditch out for the endzone, when you really want to play for short yardage pass. you wanna invest in Purdy's legs for that throw, instead they gave the Chiefs too easy a look.
#2 ON defense On the 4th and 1, bring modified cover 1 - drop Chavarius Ward back but not too far as a fail-safe tackler only to protect the TD.....you're already conceding a FG anyway, go for broke with bringing up 7 or 8 next to the line of scrimmage for a near full out blitz. They had 2 deep safeties effectively wasting a man at the line of scrimmage...... needed the full numbers up front