Bbg A made it far on challengers quals. If you take snirot and khanartist and give them other cracked teammates they will do even better.
korean roster have bigger chance to qualified to international tournament if they build another superteam with seoldam, lakia etc. their only rival is drx, which make them top 2 in the region. if they failed to beat them, they still could qualified to the stage 2 master (if korea still got 2 slots like last year) or through APAC LCQ where seoldam lost in the final. using ur logic, if seoldam could reach the final with northemption, he probably could qualified with better roster like lakia, munchkin etc.
but if the goal is only to get money and viewership, yes they should stay in NA. but at least they need to build better line up to qualified to challangers, bcs without vct they only played on small tournament like NSG with 2.5k prizepool and small viewership.