This is a good Cody vs TJ post fight breakdown by BJJ Scout.
https://www.youtube.com/watch?v=z9mothnNP94I didn't realize Justin Buccholz left Team Alpha Male early in 2018. That marks the 3rd head coach Team Alpha Male has lost in a relatively short span of time. Martin Kampmann, Duane Ludwig and now Justin Buccholz. The excuse Martin Kampmann used for quitting was his family didn't like california and he wanted to move elsewhere. Duane Ludwig leaving the team was highly publicized on the ultimate fighter season of Urijah Faber and Conor coaching and so that split was ugly. Justin Buccholz quitting as head coach seems to have swept under a rug and kept mostly quiet.
There have been hints dropped that Urijah Faber is the reason TAM head coaches have been quitting. And there have been hints dropped that Cody Garbrandt wasn't training properly (maybe because of Urijah Faber) leading up to this rematch.
That's another angle to the fight which could be worth looking at. Especially if Cody Garbrandt's skill level declines noticeably in his future fights.