I think Parker isn't getting enough credit, I knew he could box well(from the age of 5 so a big head start on quite a few fighters... AJ, Wilder, Whyte all started late IIRC) but on Saturday he showed he was perhaps underrated in many aspects(those expecting AJ to blow him away were not seeing the task ahead), his hand speed, defence, footwork and the dark arts up close all make for a fighter that a lot of boxers/promoters will look to avoid, especially without a belt to fight for. He also showed why he's never gone to the canvas and it isn't just because of his chin(which he has), he's very elusive when he needs to be and hard to pin down, while having good power and countering himself for anyone who over commits... I don't see anyone blasting him out or having an easy go with him for those reasons.
Given his age I think he'll maybe even come back stronger, I have previously said Parker seemed overrated but I don't think he'll be going away any time soon based off what he showed in his first big fight.
AJ luckily had the right opponents previously to learn from, Takam may not have been a pretty fight but it was invaluable in terms of experience in dealing with different types of fighters. He's learned so much in a short space of time, to think how late he came into the game, he's no longer just a knockout artist who might get frustrated by an opponent trying to take it to points, he can box when he needs to. There are things he could have done better on the night but judging by how he's progressing so far, him and McCracken will go and look over the footage and he'll be even better next time we see him in the ring.