Western contenders players most likely to be in OWL season 2
and for each one of these amazing players there's a Korean in the same role, just as talent, but more hardworking and better at teamwork.
Without doubt there are more Korean talented players than from each single nation (if we speak of region, it would be less evident).
It's also true that the vats majority of Korean players tend to work harder than the majority of their western counterparts.
What I don't agree with you too much is the teamwork side of it.
If they are surrounded by an all Korean team (and staff) the yes, else some (quite a few) of them become really whiny, which is a HUGE downside.
If OWL doesn't care and goes full Korean, then yes also your last point is valid, but I highly doubt it will turn out that way.
So yes I'd pick an Asking over a Fissure (yes I know different roles) every day of the week, unless my plan is to go with a full Korean roster, for the same reason I'd keep a Manneten over a Xepher, but ehi I'm western and can admit this is my personal point of view.