I would be careful in anointing a prospect as can't miss based on one year of experience. Even high school and college players have more experience with the mental rigors of baseball. Yes, his skills are good but what happens when he is challenged, how does he react to this sport becoming a job rather than a sport. Baseball like every sport has a mental aspect to it and Chourio has no experience with it. There is a history of baseball getting over excited with many poorly researched hence unknown players, most fail to live up to the hype. I wouldn't assume anything with Jackson. He is a lottery ticket.
I don't understand how a person with one year of experience is a team's best prospect. His numbers are pedestrian at best. The only reason to hype him is that he was young for his league when he put up those numbers. The fact his numbers decreased at every promotion is very suggestive. Mitchell, Frelick, Wiemers, numbers have improved with increased competition that is what you are looking for in a good prospect.