Kim Min Seok had injuries with his foot. Wheels are important to play this sport at a high level.
I don't see a lot of FB activity from him in the last few months.
To be fair, after Ryu SM, Oh SU, and Joo SH, teh squad Koreans have chosen seems to change like a a bath towel. No one single player out of the pool of 10 players they have who are WR 75 or better skill has taken over a dominant consistent place on the team.
Jeung Young Sik is an example of such a player. He seems to be on the team, off the team, on it, off it. Sometimes he has good tourneys, sometimes not. Ditto for Seo Hyun Deok. Cho Uhn Rae is the only player in hte last year with any consistent results (maybe Lee Jeung Woo). Lee Sang Soo has been pretty quiet the last year or two as well.