I think he will do well in NXT. I can't judge any young talent based on their time in AEW, since that company has no real direction when it comes to long term booking or development. He's still green, but not nearly the lost cause that some are making him out to be. I don't see any issues with his charisma, and since I began watching him in MLW, it was pretty obvious that Brian Pillman Jr would get better with experience.
Even though he debuted in 2017, he started completely green with only his football background. I don't think he really considered wrestling until around the time of his debut and he has been brought a long fairly slowly; maybe he was part-time in this for a minute. It was only about a year before he joined AEW that he really started to be on the indie scene a lot more regularly.