Flash's SC2 performance has had its up and downs. His last match against Zerg was truly entertaining (in fairness it wasn't against a top-tier Zerg), but he just doesn't have the starsense like he had in BroodWar and has not achieved anything of note that 100 other Korean SC2 progamers haven't achieved.
We are missing out on the best player to ever play any game and instead get to watch him have face-palm moments in SC2 (no Thors vs. mass mutas). BroodWar seems to be having a resurgence in Korea with the SSL league now being broadcast on Korean television with packed studios larger than SC2's studios. If he has another disappointing GSL run I think it may be time for him to switch back to BW and rain on all the wannabes' parade.