I don't know since I have no idea what K-League youth teams can offer a player like Baek. But at this point, playing regularly in competitive matches is crucial for his development, so you're right in that staying at FCB but playing for Cornella seems to be best route for him.
If he were to come back he would most likely end up playing hardly at all at a high school academy then get signed next year by a top k league team e.g. KSY. Maybe if lucky get an opportunity like Kim Shin or RSW. Which is why he should stay since he will be 18 soon and this won't be much of an issue. Since he already has the connections he should stay in Europe. Maybe consider a loan to a tertiary league.
LSW's brother trained with Cornella & will play for them starting next season. http://www.mundodeportivo.com/20140...a-se-entrena-con-el-cornella_54405573059.html
Frankly, I'm not too worried. I imagine if they are forced to be let go, that they will quickly find new homes. Far from unwanted commodities.
A Korean kid moves to Levante Youth. http://sports.news.naver.com/sports...&mod=read&office_id=241&article_id=0002198375
http://www.portsmouth.co.uk/sport/pompey/prospects-still-have-plenty-to-do-1-6054607 Kim Jaeheon released by Portsmouth. I'm not sure what kind of options a League 2 reject will have in the coming future.
Maybe get a sports-related job or something. West Ham had a Korean youth too, and he is in sports business or journalism now.
At least he's (hopefully) learned some English and spent a few years abroad on Portsmouth's dime. Could do a lot worse I guess!
Either that, or if he's settling down in England, he might sign for a semi-pro non-league team. You find a lot of the once-promising-youth players in them.
There's work permit issues if he's trying to stay in England. That may have been a factor in the decision to let him go, I think best case scenario would have been get signed by Portsmouth then loaned to some other country. Probably needs to go back to Korea or find another place with lax immigration laws. I'm not sure why they bothered to take someone on in the first place that would need to jump through so many legal hurdles to play...
Because who knows? He could have been the next superstar. That's the nature of youth football. It's not just taking a good batch and following them through until they are professionals, they take lots of youths and hope that one or two would develop to be good enough to become a first team member. Victor Moses is another example of that (though he wasn't exactly on football yoohak per se).
Juvenil B won the league. They only called up a handful of the younger kids. FYI Tito Vilanova's son is on that team.